Which of the following is most important to the heartbeat? a. aortic valve b. sinoatrial node c. lymph node d. tricuspid valve

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asked May 23, 2016 2.3k views

1 vote

Which of the following is most important to the heartbeat?

a. aortic valve
b. sinoatrial node
c. lymph node
d. tricuspid valve

Biology
high-school

Thegaw asked

by Thegaw

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1 Answer

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b. Sinoatrial nobe is the most important

Eliakin Costa answered May 28, 2016

by Eliakin Costa

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