Glaucoma. I think- I mean ocular hypertension. obviously, but I'm pretty sure the question is asking for a more general term
If the blood is carrying oxygen, the cell and the blood will have a sort of trade. The cells will give the blood the waste which will leave the body and the blood will give the cell oxygen which it needs to stay alive and continue to work.
Answer: appendix is my guess
Explanation:
Scooting football who is 60 years old
Endurance is the answer i think you're looking for.