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Lecture Exam 3

Lecture Exam 3

Q 1.The AV node is 2. ______________ make sure blood in the heart flows in only one direction 3. The heart's _______________ pumps oxygen-poor blood to the lungs. 4. The heart's ________________ produces electrical signal that tells the heart when to beat. 5. _____________ occurs only between the lungs and the heart

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1. in the right ventricle 2. valve 3. pulmonary circulation 4. SA node 5.pulmonary circulation