Why does blood pass through the heart twice in double circulation?
Answer and explanation
Correct answer: Once for the lungs and once for the body
Double circulation has two linked circuits. In the pulmonary circuit, blood leaves the heart for the lungs, releases carbon dioxide, and gains oxygen. It then returns to the heart. In the systemic circuit, the heart sends this oxygenated blood to body tissues and receives it back after exchange. Thus blood passes through the heart twice in one complete cycle, making option A correct. The other choices name unrelated organs or plant tissues.
Frequently asked questions
What is the correct answer to this question?
Once for the lungs and once for the body
Why is this the correct answer?
Double circulation has two linked circuits. In the pulmonary circuit, blood leaves the heart for the lungs, releases carbon dioxide, and gains oxygen. It then returns to the heart. In the systemic circuit, the heart sends this oxygenated blood to body tissues and receives it back after exchange. Thus blood passes through the heart twice in one complete cycle, making option A correct. The other choices name unrelated organs or plant tissues.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: World of Living. Topic: Life Processes.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
