Exchange carbon dioxide and oxygen
Because when you excersise your blood heart is pumping more blood so then it makes you breathe more.
Brains do not breathe it gets its oxygen supply from the blood in the arteries
RBC(Red Blood Cell)
You would be called a dead person because, without blood vessels, your blood can't travel, and if your blood can't travel, you can't breathe, and if you can't breathe, you will die.
yep
breathe!
it contains oxygen so you can breathe and it contains blood cells
Increased blood levels of carbon dioxide signal the brain to breathe.
Oxygen is in the air, and when you breathe in the oxygen gets into your lungs and is absorbed into the red blood cells.
from the blood into the lungs.
If you do not breathe the blood in your veins and arteries can not flow. The exchange of CO2 and oxygenated blood can not mix and exchange in the heart. The gas from CO2 will suffocate you and you will die.
so that we can take in oxygen and breathe out carbon dioxideso we can breathe so we can live.