tricuspid 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 ______.

Question

Accepted Answer

### 1. The harmful buildup of plaque in the arteries is a condition known as \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.
# Brief Explanations:
Atherosclerosis is the condition where plaque (composed of fat, cholesterol, etc.) builds up in arteries, narrowing them and affecting blood flow.
# Answer:
Atherosclerosis

### 2. The circulatory system helps regulate body \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ by dilating or constricting blood vessels.
# Brief Explanations:
Blood vessels dilate/constrict to regulate body temperature (e.g., dilate to release heat, constrict to retain heat) or blood pressure. Temperature is a key regulated factor here.
# Answer:
temperature (or blood pressure, but temperature is more direct for vessel dilation/constriction's regulatory role)

### 3. The largest artery in the body that carries oxygenated blood from the heart to the rest of the body is the \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.
# Brief Explanations:
The aorta is the main artery originating from the left ventricle, carrying oxygen - rich blood to the entire body, and it is the largest artery.
# Answer:
Aorta

### 4. The blood vessel that brings deoxygenated blood back to the heart from the lower body is called the \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.
# Brief Explanations:
The inferior vena cava is the large vein that collects deoxygenated blood from the lower extremities, abdomen, etc., and returns it to the right atrium of the heart.
# Answer:
Inferior vena cava

### 5. The phase of the cardiac cycle when the ventricles relax is known as \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.
# Brief Explanations:
In the cardiac cycle, diastole is the phase when the heart chambers (ventricles, in this case) relax and fill with blood, contrasting with systole (contraction).
# Answer:
Diastole

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Question

Explanation:

1. The harmful buildup of plaque in the arteries is a condition known as \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_.

Answer:

2. The circulatory system helps regulate body \_\_\_\_\_\_\_\_\_\_\_\_\_\_\_ by dilating or constricting blood vessels.