Physiology question--NOT DAT RELATED, JUST NEED HELP!

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S

Swoops

Hey so I do not understand this question and I have been looking at this question for about 2 hours. It is probably extremely simple but I just cant figure it out. Ok..

The question is: Show the calculation for the partial pressure of O2 in venous blood. I know that the answer is 40-50mmHg, but I dont know what the calculation would be!

So here is what I know, the cells of the body consume 250ml of O2 per minute and that the partial pressure of O2 in the arteries is 100mmHg. I have no idea where to start. I feel like the calculation is going to be extremely difficult taking into account the pressure gradient that moves oxygen from the veins from the systemic circuit into the tissue. Is there any way to calculate this?

I dont know if anyone can help me with this, but any advice would be greatly appreciated!

Hope no one is upset that I am posting this here

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