My best guy friend is in the hospital.. Okay so my best friend in the whole world is in the hospital, he's been in there for a while now.. and I'm going to visit him tomorrow. I want to bring him a present..like a get well soon card, and then just a random present.y best guy friend is in the hospital.. Okay so my best friend in the whole world is in the hospital, he's been in there for a while now.. and I'm going to visit him tomorrow. I want to bring him a present..
Quick Answer. Oxygen travels through the human body by being bonded to the iron in a special molecule in blood cells called hemoglobin. This is necessary because, unlike carbon dioxide, oxygen dissolves very poorly in water.
Through this labyrinth of blood vessels, now called veins, the hemoglobin returns carbon dioxide through the heart and to the lungs. Carbon dioxide is released back out as you exhale, and the process starts all over again. Everywhere on earth, oxygen makes up 20.96% of the gas in air (almost all the rest is nitrogen). The atmospheric pressure helps determine just how dense this air is, and therefore what concentration of oxygen the air contains.