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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
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31 votes
31 votes
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

User Zylenv
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2 Answers

12 votes
12 votes

Hi,

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

d) one direction

User CHEBURASHKA
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2.8k points
9 votes
9 votes
C.) four directions
User Aepryus
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2.5k points
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