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:
This question is about a medical condition related to arteries. Atherosclerosis is the condition where plaque (made of fat, cholesterol, etc.) builds up in arteries, narrowing them and restricting blood flow.
# Answer:
Atherosclerosis

### 2. The circulatory system helps regulate body _______ by dilating or constricting blood vessels.
# Brief Explanations:
The circulatory system, through blood vessel dilation/constriction, regulates body temperature (to maintain homeostasis: dilate to cool, constrict to retain heat) or blood pressure. Temperature is a common regulated factor here.
# Answer:
temperature (or blood pressure, but temperature is more directly related to vessel dilation/constriction for thermoregulation)

### 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 and largest artery. It starts from the left ventricle of the heart and distributes oxygenated blood to the entire body.
# 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 carries deoxygenated blood from the lower half of the body (legs, abdomen, etc.) back 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 muscles (ventricles, and also atria earlier) relax, allowing the heart chambers to fill with blood. Ventricular diastole is when the ventricles relax.
# Answer:
Diastole (or Ventricular 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.