until the hand gets tired
Carbon dioxide is at high levels and oxygen at low levels in blood that is being pumped from the heart to the lungs.
blood that is being pump from the heart to the lungs is oxygen.
The atrioventricular valves prevent blood from being pumped back into the atria.
it is pumped out of the lungs
someone who isn't stupid
systematic
More. Your heart is responding to the body's increased demand for oxygen.
it is pumped to the heart first then to the lungs
ANSWER:The answer is very simple. Blood is the fluid that gets pumped by the heart.
Deoxygenated, the blood has come from the rest of the body to the heart via veins, and is being pumped from the heart (hence being an artery) to the lungs to be oxygenated, and brought back to the heart through the pulmonary vein as oxygenated blood (to be pumped to the rest of the body again).
The blood absorbs oxygen from the lungs - enabling it to be transported throughout the body.
Blood is pumped out of heart. It comes back to the heart. This circle goes on.