What prevents backflow of blood inside the heart during contraction? (a) valves in heart (b) thick muscular walls of ventricles (c) thin walls of atria (d) all of the above?
aafreen63:
all of the above that prevents backflow of heart
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Answers
Answered by
14
Answer:
a.) Valves in heart
Explanation:
all of the above
How??
sry only valves
Answered by
4
Answer:
Valves in heart is the answer.
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