SSC
BIOLOGY
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
How does the heart work?
|
|
It pumps blood first to the lungs, back to the heart and then around the rest of the body.
|
|
|
It pumps blood first to the rest of the body, back to the lungs and then to the heart.
|
|
|
It pumps blood around the rest of the body, back to the heart and then to the lungs,
|
|
|
None of the above
|
Explanation:
Detailed explanation-1: -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.
Detailed explanation-2: -The right ventricle pumps the low-oxygen blood to the lungs to pick up a fresh supply of oxygen. The left atrium receives to high-oxygen blood from the lungs and pumps it to the left ventricle. The left ventricle pumps the high-oxygen blood to the rest of the body.
There is 1 question to complete.