12.The function of the cardiovascular
system is to transport blood throughout the body, with the heart acting as the pump for ________.
A: circulation
B: transportation
C: transplant
D: operation
system is to transport blood throughout the body, with the heart acting as the pump for ________.
A: circulation
B: transportation
C: transplant
D: operation
举一反三
- The heart is an important organ of circulation ________ function is to pump blood to all parts of the body.
- （ ） acts as a pump to maintain a constant circulation to blood throughout the body. A: heart B: kidneys C: lungs D: liver
- 29. The heart is an important organ of circulation ________ function is to pump blood to all parts of the body. A: which B: whose C: of it D: its
- The<br/>_____ of the heart is to pump blood through the body. A: function B: work C: duty D: responsibility
- Which organ is regarded as a pump in the blood circulation? A: Heart B: Artery C: Vein D: Capillary