because in order to keep functioning your muscles need oxygen that carried by the blood, to produce ATP.
you're muscles need more oxygen which is carried in you're blood. this is why you breathe faster as well.
Because your muscles are contracting and blood is filling the muscles being worked ( thats why your veins bulge when lifting)
During aerobics exercise, lungs take in air and transfer oxygen to the blood, which is then pumped by the heart to the muscles that need it.
blood is pumped through lungs
it is pumped to the heart first then to the lungs
The blood from the different parts of the body enters the heart through veins in order to be pumped/circulated. First through the lungs to be oxygenated and then back to the body where it can deliver the oxygen. Starting at the heart, freshly oxygenated blood is pumped to the body where the oxygen is used up by muscles etc., and the deoxygenated blood then returns to the heart. It is then pumped to the lungs where it absorbs oxygen from the air you breathe, and finally it is pumped back to the heart and the cycle begins over again.
Cardiac volume is the blood pumped in a single contraction
Blood is pumped out of heart. It comes back to the heart. This circle goes on.
To remove CO2 and to replenish the O2 in the blood.
The contractions and relaxation of the muscles in the heart cause the blood to be pumped around the body. The contractions push the blood out of the heart and cause it took be pushed around the body in 0.8 seconds. Other muscles in the heart relax so blood may flow into another chamber of the heart.
it is pumped out of the lungs
When blood is pumped to the lung, carbon dioxide diffuses from the blood into the alveolus. The pumonary artery carries the blood from the heart to the lungs.