carbon dioxide
Oxygen
The blood passes through tiny capillaries that lie in close proximity to the alveoli in the lungs. This is where the gas exchange takes place.
Oxygen is the gas that passes from the lungs to the bloodstream.
Oxygen
Oxygen in the lungs and passes through the alveoli, small sacs which allow gas exchange, and enters the blood to be pumped throughout the body.
oxigen is the gas that enters the blood through the lungs
blood takes oxygen and gives carbon dioxide to the lungs
it goes to the lungs
It turns red
ravioli
The blood losses O2 in the capillary beds that supply every cell in the body (exept the gas exchange cells in the lungs)
oxygen
The lungs, as blood passes through the lungs, they deposit carbon and receive oxygen.