The main site of red blood cell production is the liver.
Answer:
carbon dioxide and oxygen
Explanation:
Carbon dioxide is the waste product of cellular respiration that you breathe out each time you breathe. Blood picks up oxygen and releases carbon dioxide in the lungs. The opposite takes place in the cells where the blood releases oxygen and picks up carbon dioxide.
To create enviromental laws to protect natural resourcesfor human consumption.....i think
i wouldn't know maybe if they get made or something attacks them them maybe they do hope i helped
