Fill in the blank: the variable that is observed and measured in an experiment is the ________.
a) independent variable
b) dependent variable
c) controlled variable
d) experimental variable
Answers
The variable that is observed and measured in an experiment is the (b) dependent variable.
What is meant by experiment?An experiment is a technique used to confirm or deny a hypothesis, as well as assess the likelihood or effectiveness of something that has never been tried before.
Experiments show what happens when a specific factor is modified, which sheds light on cause-and-effect relationships.
The purpose and scope of experiments vary widely, but they all rely on a repeatable process and a logical examination of the outcomes.
Natural experimental experiments are also a thing.
While a youngster may conduct simple experiments to better grasp how objects fall to the ground, scientific teams may spend years conducting thorough research to increase their understanding of a phenomenon.
In the scientific classroom, experiments and other hands-on activities are crucial to students' learning.
A variable is an element or circumstance that can change or take on different values in a scientific experiment or study. The variable being measured, observed, and whose changes are being examined in relation to the independent variable is the dependent variable. The variable that the researcher is manipulating or controlling and whose impact on the dependent variable is being investigated is known as the independent variable.
The explanation of variable or dependent variable are:Temperature, for instance, would be the independent variable and plant growth, the dependent variable in a study looking at how temperature affects plant growth. The temperature would be changed (for example, some plants would be kept at a warm temperature while others were kept at a lower temperature), and the researcher would measure the growth of the plants to determine how the temperature influenced it.
The independent variable is typically something the researcher can influence, whereas the dependent variable is something the researcher can track and quantify.
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Related Questions
Which section of the article BEST explains why the development of CRISPR-Cas9 is significant for the scientific community?
Answers
Answer:
It allows the scientists to activate gene expression instead of cutting the DNA.
Explanation:
The development of CRISPR-Cas9 is significant for the scientific community because this development allows the scientists to activate gene expression instead of cutting the DNA. This technique allows the scientists and researchers to study the function of the gene. Before development, Cas9 enzymes produced by the CRISPR system binds to the DNA and cuts it by shutting the targeted gene off so this development of CRISPR-Cas9 enables the scientists to activate gene expression instead of cutting the DNA.
All of these examples show evidence for evolution because they show
Answers
Because they all demonstrate change over time and descended from a common ancestor, these examples all provide proof of evolution.
What proof exists for evolution?In this section, we'll talk about five different sorts of evidence supporting evolution: ancient organism remains, fossil layers, parallels between current animals, similarities in DNA, and embryological similarities.
What are the three basic types of proof for evolution?Fossil evidence, biogeographical evidence, and anatomical evidence were some of the many types of evidence that Darwin utilized to support his theory of evolution by natural selection.
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How high is the ceiling in a school gym if a volleyball thrown upward from the floor at 15 m/s barely touches the ceiling before returning to the ground?
Answers
Answer:
11.47 m
Explanation:
Givens
vi = 15 m/s
a = - 9.81 m/s^2
vf = 0
d = ?
Formula
vf^2 = vi^2 + 2ad
Solution
0 = (15)^2 + 2*(-9.81)*d
- 225 = 2 * - 9.81 *d
-225 = - 19.62 * d
d = - 225/-19.62
d = 11.47 m
The height of the ceiling in the school gym from the floor is 11.48m.
HOW TO CALCULATE HEIGHT OF A PROJECTILE:
Using one of the equations of motion as follows:v² = u² + 2as
Where;
v = final velocity (m/s)
u = initial velocity (m/s)
a = gravitational acceleration (m/s²)
s = distance traveled (m)
According to this question,
The final velocity (v) of the volleyball is 15m/sThe initial velocity is 0m/sThe acceleration due to gravity is 9.8m/sUsing the formula, v² = u² + 2as, the height of the ceiling (s) can be calculated as follows:
15² = 0² + 2 (9.8) (s)
225 = 0 + 19.6s
225 = 19.6s
s = 225/19.6
s = 11.48m
Therefore, the height of the ceiling in the school gym from the floor is 11.48m
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i need to persuade someone to live in a chaparral
Answers
Answer:
Just make them. That usually works. Or kidnapping. That also works
Explanation:
HELPP
Why is it important that oxygen and carbon dioxide levels be closely regulated in the human body?
A) Both gases are needed for the proper functioning of cell processes
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
C) Both gases are waste products that need to be removed from cells
D) The carbon and oxygen from the gases are needed to build new molecules.
Answers
Answer:
B) Oxygen is needed for cell processes and carbon dioxide is a waste product
Explanation:
Cellular respiration refers to the cellular mechanism by which organisms combine molecular oxygen (O2) with organic compounds obtained from foods, it is a chemical reaction that releases 1-energy (ATP), which is used by cells to carry out its functions, 2-carbon dioxide (CO2) and 3-water (H2O). During the gas exchange, O2 is first transported from the lungs to the blood cells, which subsequently deliver nutrients and O2 to all cells of the body. Simultaneously, CO2 diffuses from cells to tissue capillaries, and then this waste product passes from the bloodstream to the lungs where is eliminated.
which of the following statements is/are correct regarding seed dormancy? I. It is a result of endogenous control.
II. Delayed germination is advantageous to plants.
III. Impermeable and hard seed coat results in the dormancy of the seed.
A
Only II
B
Only III
C
I and III
D
I, II and III
Answers
The correct answer is option (C) "I and III."
Both statements I and III are correct regarding seed dormancy. Statement II is incorrect.
Statement I states that seed dormancy is a result of endogenous control, which is true. Endogenous factors within the seed, such as hormones and genetic mechanisms, regulate the dormancy period and prevent germination until certain conditions are met.
Statement II suggests that delayed germination is advantageous to plants. However, this statement is incorrect. Delayed germination is not universally advantageous to plants. While some seeds may benefit from delayed germination to ensure favorable environmental conditions for growth and survival, other seeds may have evolved strategies for immediate germination. The advantage of delayed germination depends on the specific ecological context and the species involved.
Statement III states that an impermeable and hard seed coat results in the dormancy of the seed, which is true. A hard and impermeable seed coat can prevent water uptake and gas exchange, thus inhibiting germination. This dormancy mechanism ensures that the seed remains dormant until conditions are favorable for germination, such as sufficient moisture, temperature, or light.
In conclusion, statements I and III are correct regarding seed dormancy. Seed dormancy is controlled by endogenous factors, and an impermeable and hard seed coat can contribute to the dormancy of the seed. However, statement II, suggesting that delayed germination is advantageous to plants, is incorrect.
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Two animals of the same species would have__.
A. Different Names
B. One word of their name in common
C. the Same Name
D. 75% of their name in common
Answers
Answer:
c. the same name
Explanation:
Two animals of the same species would have the same name. Thus, the correct option for this question is C.
What is meant by species?Species may be defined as a group or collection of organisms that can significantly reproduce with one another in nature in order to develop fertile offspring.
A species is often characterized as a group of individuals that actually or potentially interbreed in nature. In this sense, a species is the biggest gene pool possible under natural conditions.
A group of closely related organisms that are very similar to each other and are usually capable of interbreeding and producing fertile offspring. The species is the fundamental category of taxonomic classification, ranking below a genus or subgenus. Each and every individual of the same species have an identical name and characteristics.
Therefore, two animals of the same species would have the same name. Thus, the correct option for this question is C.
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According to the weather map seen here, we could expect weather conditions in Memphis to include
Answers
Answer:
Explanation:
A. Warmer tempartures,clearing
Answer:
Warmer temperatures, clearing.
Explanation:
I took the test :)
In conditioning, during the sequence of delaying the stimulus, the dogs often displayed____ anxiety or excitement
Answers
In conditioning, during the sequence of delaying the stimulus, the dogs often displayed anticipatory anxiety or excitement. Therefore, the correct option is (C).
During the sequence of conditioning, as the stimulus is delayed, dogs often display anticipatory anxiety or excitement. This phenomenon is known as the "anticipatory response" and is a form of classical conditioning. The dogs have learned to associate the delayed stimulus (e.g., the sound of a bell) with the upcoming reward or punishment. As a result, they exhibit a conditioned response, expressing their anticipation of the outcome even before the actual stimulus is presented.This anticipatory response is a crucial aspect of classical conditioning, demonstrating the learned association between the conditioned stimulus (the bell) and the unconditioned stimulus (the reward or punishment). It reflects the dog's ability to predict the forthcoming event based on their prior experiences and conditioning history.Therefore, the correct option is (C).
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Question:
In conditioning, during the sequence of delaying the stimulus, the dogs often displayed____ anxiety or excitement
A) negative
B) zero
C) anticipatory
Write a function that dynamically allocates an array of integers. The function should accept an integer argument indicating the number of elements to allocate. The func- tion should return a pointer to the array.
Answers
The "allocate_array" function is a C function that dynamically allocates an array of integers based on the number of elements specified as an argument. It returns a pointer to the allocated array.
The function uses the "malloc" function to allocate memory for the array and performs error checking to ensure successful allocation.
In C, dynamic memory allocation can be done using the "malloc" function. The "allocate_array" function takes an integer argument indicating the number of elements to allocate and returns a pointer to the allocated array. Here is an example implementation:
#include <stdio.h>
#include <stdlib.h>
int* allocate_array(int num_elements) {
int* array = (int*)malloc(num_elements * sizeof(int));
if (array == NULL) {
fprintf(stderr, "Memory allocation failed.\n");
exit(EXIT_FAILURE);
}
return array;
}
In the function, we use the "malloc" function to allocate memory for the array based on the number of elements specified. The size of each element is calculated using "sizeof(int)". If the allocation fails, we handle the error by printing an error message and exiting the program. If the allocation is successful, we return the pointer to the allocated array.
By using the "allocate_array" function, you can dynamically allocate an array of integers by passing the desired number of elements as an argument, and receive a pointer to the allocated array.
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what is the correct path for a glucose molecule through the kidney?
Answers
The correct path for a glucose molecule through the kidney involves its filtration in the glomerulus, reabsorption in the proximal tubule, and potential excretion in the urine if the reabsorption capacity is exceeded.
When blood flows through the kidney, it enters the glomerulus, a network of tiny blood vessels. In the glomerulus, filtration occurs, where small molecules, including glucose, are filtered out of the blood and into the renal tubules. However, in a healthy individual, most of the filtered glucose is reabsorbed in the proximal tubule of the nephron. This reabsorption process ensures that glucose is efficiently retained in the bloodstream rather than being excreted in urine. The reabsorbed glucose is transported back into the bloodstream via specialized glucose transporters. However, if blood glucose levels are elevated, exceeding the kidney's reabsorption capacity, excess glucose may not be completely reabsorbed, resulting in glucose appearing in the urine, a condition known as glucosuria.
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PLEASE SEE THE IMAGE BELONG I DONT KNOWWWWWW PLEASE
Answers
Answer:
Black
Black
White
Explanation:
the capital letter represents the black fur since it's dominant and the recessive shows when there are no dominant traits in the mix
Answer:
black black white.
Explanation:
capital letters mean black
The stages of a plant’s life cycle are _____. zygote and fertilization sporophyte and gametophyte fertilization and sporophyte gametophyte and zygote
Answers
Answer:
Hello! So sorry I am late! I do not have the exact answer for this question but here is some information that may be able to help you.
Plants have two distinct stages in their lifecycle: the gametophyte stage and the sporophyte stage. The haploid gametophyte produces the male and female gametes by mitosis in distinct multicellular structures. Fusion of the male and females gametes forms the diploid zygote, which develops into the sporophyte.
Explanation:
I hope the information above was able to help you! Again I'm sorry I cant give the answer you were looking for! Have a great rest of your day or night and good luck on your work!
<3 <3 <3
The ligament that attaches the lateral femoral epicondyle to the fibula is called the?
Answers
Answer:
fibular collateral ligament / lateral collateral ligament (LCL)
hope this helps! <3
Why are sequoias and redwoods considered to be such efficient carbon sinks? Provide data that shows, on average, how much carbon giant sequoias and redwoods collect over time.
Answers
Answer:
Thwe anser is that redwood trees are not very similer sequiao tress. It affects the temptuertatre very badly.
Sequoias and redwoods considered to be such efficient carbon sinks because they locks large amount of carbon dioxide.
How trees locks carbon dioxide?The leaves absorb carbon dioxide and convert it into glucose and oxygen through photosynthesis.Photosynthesis is a process by which the green plants make their own food in presence of sunlight, chlorophyll and carbon dioxide.As trees grows larger in size, it locks carbon dioxide in branches, trunks and roots.1 redwood tree can absorb as much carbon as it is absorbed by 250 normal trees. An area full of redwood can lock 250 tons of carbon.
Hence, the sequoias and redwoods lock large amount of carbon making it an efficient sinks.
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match the biomolecules to their monomers.proteinsanswer 1choose...lipidsanswer 2choose...carbohydratesanswer 3choose...nucleic acids
Answers
Match the biomolecules to their monomers Proteins: Amino acids, Lipids: They are not made up of monomers, Carbohydrates: Monosaccharides, Nucleic acids: Nucleotides.
Proteins are made up of monomers known as amino acids, while carbohydrates are made up of monomers known as monosaccharides. Lipids, on the other hand, are not made up of monomers since they are not polymers. Nucleic acids are made up of monomers known as nucleotides.
Proteins: Proteins are macromolecules composed of amino acids linked together by peptide bonds. Amino acids are the building blocks of proteins, and there are twenty different amino acids commonly found in proteins. Lipids: Lipids are made up of fatty acids and glycerol but are not made up of monomers since they are not polymers. There are different types of lipids such as phospholipids, triglycerides, and steroids.
Carbohydrates: Carbohydrates are the most abundant biomolecules in the world, and they serve many essential functions in the body. They are composed of monomers known as monosaccharides. Examples of monosaccharides include glucose, fructose, and galactose. Nucleic acids: Nucleic acids are biomolecules composed of monomers known as nucleotides. Nucleotides have three main components: a sugar, a phosphate group, and a nitrogenous base. There are two types of nucleic acids: DNA and RNA.
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What enzyme is needed to convert testosterone to dihydrotestosterone?.
Answers
Answer:
5-alpha reductase
Explanation:
The 5 alpha-reductase enzyme acts on these target tissues to convert testosterone to DHT. DHT is largely a paracrine hormone because of this isolated synthesis at a particular target tissue. It is mostly produced in the liver, therefore the systemic circulation only contains modest levels of it.
What role of 5-alpha reductase enzyme?The enzyme 5 alpha-reductase converts testosterone to DHT. The need for 5 -reductase differs with different tissues, as demonstrated by the autosomal recessive genetic condition 5 -reductase deficiency.
By acting on certain target tissues, the 5 alpha-reductase enzyme transforms testosterone to DHT. DHT is largely a paracrine hormone due to this isolated synthesis at a specific target tissue. Only trace levels are seen in the systemic circulation because it is primarily synthesized in the liver.
Therefore, 5-alpha reductase enzyme is needed to convert testosterone to dihydrotestosterone.
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In mature animals when do cells still need to differentiate?
Answers
Answer:
As an organism develops, cells differentiate to form different types of cells. Most types of animal cell differentiate at an early stage. Many types of plant cells retain the ability to differentiate throughout life. In mature animals, cell division is mainly restricted to repair and replacement.
Explanation:
''.''
In mature animals cells differentiate during : Repair and replacement of animal cells
Cells differentiate in organisms and plants to create more cell types, as the organism and plants continue to mature. While cell differentiation in animals occur mostly before maturity, plants cells continue to differentiate until they die.
While in mature animals, cells differentiates at maturity only when the cells of the mature animal needs repair or replacement due to damage caused to the a cell or tissue.
Hence we can conclude that in mature animals cells differentiate during repair and replacement of cells.
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What animal in the Andes Mountains would be at the top of the food chain A. Rats B. Pumas C. Bears D. Guanacos. Please help
Answers
Answer:
im not sure but i think its Guanacos
Explanation:
The animal in the Andes Mountains would be at the top of the food chain - B. Pumas
Food chainthe sequence of movement of energy and matter from one level of an organism to another.
A carnivore that does not have predators is called the top predator and is situated at the top of the chain.
In mountain Andes, the carnivores are puma, lion and other carnivores.
Thus, The animal in the Andes Mountains would be at the top of the food chain - B. Pumas
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which term means kidney softening?group of answer choicesnephrosclerosisnephromalacianephritisnephroptosis
Answers
The term that means kidney softening is nephromalacia. This condition refers to the abnormal softening of the kidney tissue, which can be caused by various factors such as inflammation, infection, trauma, or ischemia.
Nephromalacia can lead to a range of symptoms including pain in the lower back or abdomen, fever, nausea, vomiting, and changes in urinary frequency or color.
The causes of nephromalacia can vary, but some of the most common include dehydration, kidney infections, high blood pressure, diabetes, and autoimmune disorders. Additionally, kidney stones or tumors can also contribute to the development of this condition.
Diagnosis of nephromalacia typically involves a combination of physical examination, blood tests, urinalysis, and imaging studies such as ultrasounds, CT scans, or MRIs. Treatment options for this condition depend on the underlying cause but may include medications to control infection or inflammation, dietary changes, or surgery in more severe cases. It is important to seek medical attention if you experience any symptoms of nephromalacia to ensure prompt diagnosis and treatment.
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Which statement accurately describes dark matter?
1: It is the same as dark energy.
2: It is well understood by scientists.
3 :It does not emit electromagnetic radiation.
4: It can be observed by shifts in red and blue light.
Answers
Answer:
1
Explanation:
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Description
Dark matter is a form of matter thought to account for approximately 85% of the matter in the universe and about a quarter of its total mass–energy density or about 2.241×10−27 kg/m3. .
A nurse is caring for a client with chronic kidney failure. Which clinical findings should the nurse expect when assessing this client? Select all that apply.
1 Polyuria
2 Lethargy
3 Hypotension
4 Muscle twitching
5 Respiratory acidosis
Answers
Chronic kidney failure is a medical condition where the kidney's function decreases progressively, leading to the retention of toxins and metabolic waste products in the bloodstream.
The clinical findings of a client with chronic kidney failure are as follows:1. Polyuria: Polyuria is an excessive urination condition. The kidneys are unable to filter urine effectively, resulting in an increase in urine output.2. Lethargy: Lethargy is a state of drowsiness, sluggishness, and unresponsiveness. It can occur due to the accumulation of metabolic waste products in the bloodstream.3. Hypotension: Hypotension is low blood pressure, which can occur when the kidney's ability to produce a hormone that regulates blood pressure decreases.4. Muscle twitching: Muscle twitching occurs due to the accumulation of toxins in the bloodstream, which causes muscle contractions.5. Respiratory acidosis: The body's pH level is balanced by the kidneys and lungs.
When kidney failure occurs, it can lead to respiratory acidosis, which is caused by carbon dioxide retention in the bloodstream.These clinical findings are essential to note when a nurse is caring for a patient with chronic kidney failure. Proper assessment and monitoring are crucial in ensuring a positive outcome and quality of life for the patient.
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Dr. Leary argues that muscle contraction occurs because muscle fibers undergo a physical process of shortening. His explanation is a __________
Answers
Dr. Leary argues that muscle contraction occurs because muscle fibers undergo a physical process of shortening. His explanation is a Reduction .
Skeletal muscle fibers become shorter as a result of the interaction between dense and thin strands within sarcomeres, which shortens the sarcomere. Summation happens when multiple cues are combined to cause a stronger muscular contraction.
The combination of several spasms into one continuous movement is known as tetanus. Recruitment is the process by which the quantity of motor units triggered in a muscle grows as the number of motor neurons involved increases.
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Please help me with this
Answers
Answer:
The correct answer is C.
Explanation:
The correct answer is C. Productions, that is what the diagram is highlighting throughout the image!
Which structure determines the traits that will be passed to offspring?
A- chromosome
B- centromere
C- nuclear membrane
D- spindle fibers
Answers
decreased secretion of hydrogen ions would result in a(n) ______________ of blood ____________?
A) increase, pressure
B) decrease, volume
C) increase, sodium levels
D) decrease, pH
E) increase, urea
Answers
The decreased secretion of hydrogen ions would result in an increase of blood pH. Therefore, the answer is D) decrease, pH.
What is hydrogen ?Hydrogen is a chemical element with the symbol H and atomic number 1. It is the lightest and most abundant element in the universe, making up about 75% of its elemental mass. At standard temperature and pressure, hydrogen exists as a diatomic gas, consisting of two atoms of hydrogen bonded together (H2). It is a colorless, odorless, and highly flammable gas. Hydrogen is used in a wide range of applications, including fuel for vehicles, industrial processes, and as a feedstock for the production of various chemicals.
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What moves in one direction through an ecosystem rather than being used over and over again like nutrients are?
Answers
Answer:
I believe its energy - if im incorrect my apologiesss
Questions
Teeth help to break down large pieces of food into lots of smaller pieces.
Suggest how this can help enzymes to digest the food faster.
Answers
Answer:
Answer:it helps in a lot of ways
Answer:it helps in a lot of waysExplanation:
Answer:it helps in a lot of waysExplanation:for instance, the enzyme in the mouth that act on carbohydrates called tyalin can only have an effect on the food particles when it is chopped by the teeth into smaller pieces
The following is a list of the steps that occur in the production of an auditory sensation.
1. The pressure wave distorts the basilar membrane on its way to the round window.
2. Movement of the tympanic membrane causes displacement of the malleus.
3. Displacement of the stereocilia stimulates sensory neurons of the cochlear nerve.
4. Movement of the malleus causes movement of the incus and stapes.
5. Distortion of the basilar membrane forces the hair cells of the organ of Corti toward or away from the tectorial membrane.
6. Movement of the oval window establishes pressure waves in the perilymph of the vestibular duct.
The proper sequence for these steps is:_____.
a. 2, 4, 6, 3, 5, 1.
b. 2, 4, 1, 6, 5, 3.
c. 2, 1, 4, 6, 5, 3.
d. 2, 5, 4, 6, 1, 3.
e. 2, 4, 6, 1, 5, 3.
Answers
movement of the tympanic membrane causes displacement of the malleus
describe the path and all the related steps a molecule of oxygen would take from the air in the lungs to a muscle cell
Answers
The path in which a molecule of oxygen will take from the air in the lungs to a muscle cell is as follows: alveoli ⇒ pulmunary capillaries ⇒ pulmunary vein ⇒ heart ⇒ aorta ⇒ arteries ⇒ capillaries ⇒ muscle cell.
Imagine this: you're a molecule of oxygen, about to go on a journey through the human body. First off, you start from the nose as the human breathes in. You go past the nose and nasal cavity and go into the throat, going past the larynx and the pharynx and into the trachea. You are now heading to the lungs. After the trachea, you enter into the left or the right bronchi, then the bronchioles, which leads to the alveoli in the lungs. At this point, the journey in the question (from the lungs to the muscle cell) is about to start:
Pulmonary capillaries: this is a part of the blood vessels that allows oxygen in the lungs to get dissolved in the blood. From the air in the alveoli, you (the oxygen molecule) will pass through the wall of the capillary into the blood plasma and get dissolved in haemoglobin in a red blood cell. The haemoglobin is going to act as a transport medium to get you to your destination.Pulmonary vein: the pulmonary capillaries are connected to the pulmonary veins, so the haemoglobin molecule you're dissolved in would have to pass through the pulmonary vein first before reaching the heart.Heart: on getting to the heart, you are poured into the left atrium, then into the left ventricle, which pushes you into the aorta. The aorta is the largest artery and the closest artery to the heart. All other arteries are branched off from the aorta, so you'll enter into an artery (blood vessels that take blood away from the heart) after passing through the aorta.Capillaries: while in the artery, you will continue to travel through the blood stream for a while as the artery gets more and more narrow, so narrow that at a point, the walls are only one cell thick. This is now the capillary. You will leave the haemoglobin and diffuse out of the capillary, and go into the muscle cell by diffusion. At this point, you have reached your destination - a muscle cell.Learn more about oxygen here:
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