Question

3. Our heart pumps
when we run and
when we sit
​

Answer 1

Answer:

The right ventricle pumps the oxygen-poor blood to the lungs through the pulmonary valve. The left atrium receives oxygen-rich blood from the lungs and pumps it to the left ventricle through the mitral valve. The left ventricle pumps the oxygen-rich blood through the aortic valve out to the rest of the body.

Athletic heart syndrome (AHS) is a non-pathological condition commonly seen in sports medicine in which the human heart is enlarged, and the resting heart rate is lower than normal. The athlete's heart is associated with physiological remodeling as a consequence of repetitive cardiac loading.

Explanation:

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Answer 2

Concept

Through the pulmonary valve, the right ventricle transfers oxygen-poor blood to the lungs. Through the mitral valve, the left atrium transfers oxygen-rich blood from the lungs to the left ventricle. The aortic valve allows the left ventricle to send oxygen-rich blood to the rest of the body.

Given

Our heart pumps------------when we run and-------when we sit.

Find

Suitable word that fits into the blank and is meaningful and scientifically correct.

Solution

Due to the increased oxygen demand of our muscles when we exercise ourselves, our body may require three to four times our typical cardiac output during exercise. Our heart usually beats more quickly during exercise to increase blood flow to your body and to increase supply of oxygen so that our muscles can respire.

Hence, Our heart pumps faster when we run and slower when we sit.

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