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If you held your breath, the concentration of oxygen in your lungs would decrease. The concentration of carbon dioxide would increase in your lungs.
It is because your lungs will turn black. The oxygen is usually at the lungs so it is harder to get oxygen.
the blood absorb oxygen in the lungs(cappilaries)
From the air drawn into the lungs by movement of the diaphragm
Oxygen enters via the lungs.
If you held your breath, the concentration of oxygen in your lungs would decrease. The concentration of carbon dioxide would increase in your lungs.
It is because your lungs will turn black. The oxygen is usually at the lungs so it is harder to get oxygen.
oxygen makes it redI would think it has to do with the amount of oxygen in the blood stream.
Low oxygen levels cause vasodilation in systemic arterioles.High oxygen levels cause vasodilation in capillaries in the lungs.
oxygen
If you have 3 liters of air in your lungs and 2 tenths of that is oxygen, how many milliliters of oxygen are in your lungs?
oxygen
the blood absorb oxygen in the lungs(cappilaries)
blood takes oxygen and gives carbon dioxide to the lungs
lungs take oxygen into your body
You need oxygen in your lungs in order to breathe. Without blood to transport it your lungs would have none and you wouldn't be able to breathe.
Blood goes to the lungs oxygen poor and comes out of the lungs oxygen rich.