Oxygen.
blood takes oxygen and gives carbon dioxide to the lungs
oxigen is the gas that enters the blood through the lungs
oxigen is the gas that enters the blood through the lungs
Oxygen is the gas that enters the blood during inspiration. It is taken into the lungs from the outside air and then diffuses into the blood vessels in the lungs.
Heart has two sides (4chambers) separated by a septum.One side it collects the impure blood ie from all the parts of our body and pumps it to lungs. At lungs through alveoli the co2 diffuses out and oxygen enters the blood. this pure blood (oxygenated blood) enters the other side of heart from where it is pumped to all body parts AND cycle continues.
Oxygen
oxygen
The blood needs to receive oxygen from the lungs so it can deliver it to the rest of the body.
The blood picks up oxygen in the lungs and gives it to all the organs in the body that needs it.
carbon dioxide
carbon dioxide
The lungs have a large number of blood vessels because blood vessels carry oxygen to the lungs and the lungs need a lot of oxygen.Because it makes the transfer of oxygen from the lungs to the bloodstream quicker.