Answer:
B..........................
Explanation:
Answer:
depends
Explanation:
how many homes does dog have. my minecraft house has 3 dogs .
When blood is in the lungs,
where oxygen is plentiful, oxygen easily binds to the first subunit and then quickly fills up the remaining ones. Then, as blood circulates through the body, the oxygen level drops while that of carbon dioxide increases. In this environment, hemoglobin releases its bound oxygen.
