Biology, asked by onnyeadfoster, 16 hours ago

The heart is a muscular organ that pumps blood. Blood that contains waste materials is brought to the heart by blood vessels. This blood enters the_ and then moves down. The presence of the__ prevents the backflow of blood inside the heart.

Answers

Answered by afreensultana2468

3

Answer:

Atrium

the presence of backward flow of blood is prevented by valves

Answered by tanisha14147

1

Right auricle/ right atrium , Tricuspid valve

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