Question

the circulatory system is primarily responsible for transporting throughout the body
the muscular organ that pumps blood throughout the body is called the
the smallest blood vessels, which facilitate the exchange of nutrients with cells, are called
the liquid component of blood, making up about 55% of its total volume, is called
oxygen-rich blood is carried away from the heart by
the component of blood that carries oxygen from the lungs to tissues is
the ______ valve prevents blood from flowing back into the left atrium from the left ventricle.
during exercise, the circulatory system increases the heart rate to deliver more ______ to the muscles.
the phase of the cardiac cycle when the heart muscle contracts is known as
the \lub\ sound of the heartbeat is caused by the closing of the ______ and mitral valves.
the harmful buildup of plaque in the arteries is a condition known as ______.
the circulatory system helps regulate body ______ by dilating or constricting blood vessels.
the largest artery in the body that carries oxygenated blood from the heart to the rest of the body is the
the blood vessel that brings deoxygenated blood back to the heart from the lower body is called the
the phase of the cardiac cycle when the ventricles relax is known as

Explanation:

Each answer is based on core human circulatory system physiology concepts, matching the blank to the correct anatomical/functional term.

Answer:

1. The circulatory system is primarily responsible for transporting blood/oxygen and nutrients throughout the body.
2. The muscular organ that pumps blood throughout the body is called the heart.
3. The smallest blood vessels, which facilitate the exchange of nutrients and gases, are called capillaries.
4. The liquid component of blood, making up about 55% of its total volume, is called plasma.
5. Oxygen-rich blood is carried away from the heart by arteries.
6. The component of blood that carries oxygen from the lungs to tissues is red blood cells (hemoglobin).
7. The mitral (bicuspid) valve prevents blood from flowing back into the left atrium from the left ventricle.
8. During exercise, the circulatory system increases the heart rate to deliver more oxygen-rich blood to the muscles.
9. The phase of the cardiac cycle when the ventricles contract is known as ventricular systole.
10. The "lub" sound of the heartbeat is caused by the closing of the atrioventricular (AV) and mitral valves.
11. The harmful buildup of plaque in the arteries is a condition known as atherosclerosis.
12. The circulatory system helps regulate body temperature by dilating or constricting blood vessels.
13. The largest artery in the body that carries oxygenated blood from the heart to the rest of the body is the aorta.
14. The blood vessel that brings deoxygenated blood back to the heart from the upper body is called the superior vena cava.
15. The phase of the cardiac cycle when the ventricles relax is known as ventricular diastole.