About 600 million gallons.
(Average amount of blood in a human x number of humans currently on the planet.)
Yes. Bones need a blood supply as much as any other tissue.
oxygensugarfatsamino acidsetc.Basically everything cells need for survival.
No. Haemoglobin is a substance found in only red blood cells.
No, because generally, blood doesn't contain any bacteria. Therefore, it won't affect organism growth or results.
It depends. You need to decide which swimming place.
I am not positive but I believe that it could contain other chemicals that will mess up the test
no
swimming
how to swim
goggles
Because arteries are narrower, thus increasing the pressure in the arteries. So you need thicker walls to contain the blood under pressure.
Swimming is a best entertainment. So people want entertaintment. Just for chill.