Back flow of blood in the heart is prevented by one-way valves. The blood is pushed through by the force of contraction, the valves close, blood can't flow back. The valves are: Tricuspid = between the upper chamber (Right atrium) and the lower chamber (Right ventricle) Pulmonary semilunar = between the Right ventricle and the Pulmonary trunk Mitral (or bicuspid) = between the Left atrium and the Left ventricle Aortic semilunar= between the Left ventricle and the Aorta If the Mitral (or bicuspid) valve is weakened, the blood might seep back into the Left atrium (Mitral Valve Prolapse) but normally it does not. More info can be find on http://en.wikipedia.org/wiki/Heart Hope it helps.
veins are responsible for bringing blood back to the heart.
The flow of blood from the heart to the lungs and back to the heart is called the pulmonary circulation.The blood flowing from the heart to the lungs would be deoxygenated and blood flowing towards the heart from the lungs would be oxygenated.
Valves prevent the backflow of blood, in this case the semilunar valves stop blood flowing back into the heart.
They prevent back flow and help to return blood to the heart.
The valves in the veins
The flow of blood from the heart to the lungs and back to the heart is called pulmonary circulation.
veins are responsible for bringing blood back to the heart.
Semilunar valves
it just goes back
The flow of blood from the heart to the lungs and back to the heart is called the pulmonary circulation.The blood flowing from the heart to the lungs would be deoxygenated and blood flowing towards the heart from the lungs would be oxygenated.
the heart is a double pump The heart pumps deoxigenated blood from the body through the heart and then through the lungs the back to the heart.
Valves prevent the backflow of blood, in this case the semilunar valves stop blood flowing back into the heart.
If your asking if they slow the blood down... no, they open to allow blood to flow with the beating of the heart, but close to prevent back flow/flowing away from the heart
They prevent back flow and help to return blood to the heart.
That's called the circulatory system.
The three main paths are the pulmonary path which moves from the heart to the lungs and back, the somatic path where blood flows to the tissues and back and the flow of blood to the muscle of the heart and back.
From the capillaries, blood will flow into the veins and pump the un-oxygenated blood back to the heart.