Question

human circulatory system quiz
the heart is composed of how many loops?
(1 point)
○ 1
○ 2
○ 3
○ 4

Explanation:

The human circulatory system has two main loops: the pulmonary loop (carries deoxygenated blood to the lungs for oxygenation) and the systemic loop (delivers oxygenated blood to the body's tissues and returns deoxygenated blood to the heart).

Answer:

2