bicuspid (between left ventricle and atrium) and tricuspid (between right ventricle and atrium) are the 2 valves that prevent the backward flow of blood from the ventricles into the atria. There are two semi-lunar valves also prevent the backward flow of blood from arota to the left ventricle (Aortic valve) and from the Pulmonary Artery to the right ventricle (the Pulmonary valve).
The valves at the top of the heart are the semi lunar vavles. These stop back flow from the pulmonary artire and pulmonary vein (to and from the lungs) The valves that stop back flow in the heart from the atruims to the ventricls are the tricuspid valve (on the right) and the bicuspid valve (on the left) (be carful here, because while the tricuspid valve is a universal term, bicuspid is not used in the USA, it is called something else whic escapes me at the moment) the valve that stops blood coming back into the heart from the aorta (main artery going to body) is the aortic valve and the the valve that stops back flow from the veina cava (main vien going back into the heart from the body) is just veina cava valve.
The valves in the veins
In the heart/arteries, the Aortic valve prevents blood from flowing backwards. In the systemic veins, eustachean valves prevent the backwards flow of blood.
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.
The valves in the veins
It is to allow the blood to flow in one direction - towards the heart, it prevents back flow.
The flow of blood from the heart to the lungs and back to the heart is called pulmonary circulation.
In the heart/arteries, the Aortic valve prevents blood from flowing backwards. In the systemic veins, eustachean valves prevent the backwards flow of blood.
Tiny valves in your veins keep blood from backing up. The pumping force of your heart keeps the blood flowing forward. If a valve in your leg stops working properly, the blood seeping back causes varicose veins mainly in your legs, though can occur anywhere.
veins are responsible for bringing blood back to the heart.
Blood is a constant whereabout in our bodies. As of such a frequent heartbeat exists within our system. Which causes the blood within our bodies to flow forward, in lamense terms it produces a very large push for the blood to distribute it's nutrients throughout the body and back within our heart and out again. This constant push is what prevents blood from flowing backwards in your veins.
Semilunar valves
it just goes back
The pulmonary semilunar valve is a heart valve that separates the right ventricle from the pulmonary artery. It functions to prevent the backflow of blood from the pulmonary artery back into the right ventricle during the heart's pumping cycle.
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 pulmonary valve is a semilunar valve that prevents the back flow of blood back from the lungs to the right ventricle.