Answer:
is the spread of something more widely
Explanation:
Answer:
There is no mixing of oxygen-rich and oxygen-poor blood.
- -
The right atrium and right ventricle of the human heart pump oxygen-poor blood to the lungs and the left atrium receives oxygen-rich blood. They never mix.
No because a chemical reaction that is at equilibrium in living cells is not capable of doing any work
Mostawa is the correct answer
