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The valves in the heart open and close to move blood in between heart chambers. O a) three directions O b) two directions O c) four directions d) one direction

Answer :

d) one direction

HEART VALVES OPEN TO MOVE BLOOD ONLY IN ONE DIERECTION WHICH IS FORWARD DIRECTION BLOOD NEVER FLOW BACKWARD INSIDE HEART.
Pandamillego

Hi,

The valves in the heart open and close to move blood in between heart chambers.

Answer:

d) one direction

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