Answer:
exchange carbon dioxide for oxygen,help with the movement of the blood cells that pump oxygen-rich blood to all cells in the body.
Explanation:
First, tell your teacher that the Sun is not at the center of the UNIVERSE. He observatory that occasionally planets would travel backwards in the night sky & people also observed the moons rotating around Jupiter to prove his theory.
The children were given the recessive traits from their mother and the dominant traits from their father because the genes mix when they have children.
<span>C war does not distinguish between military and civilian acts of aggression </span>
I don't know how we can really help u