Semilunar valves
The structure of a bird's heart ensures efficient oxygenation of blood by maintaining a unidirectional flow. This enables proper circulation of oxygen-rich blood throughout the body and oxygen-poor blood back to the lungs for re-oxygenation.
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.
The reason we have valves in our heart is to direct the flow of blood in one direction. This ensures that it is able to circulate through the body.
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.
Valves are the "doors" which allow the proper amount of blood into each ventricle of the heart so it does not "explode" or push too much into the body. When high blood pressure occurs the culprit can be a defective valve that is leaking or failing to open and close properly. Not many people have that type of high blood pressure. There are many types of high blood pressure which doctors can determine by listening to the valves in the heart or elsewhere.
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.
Blood flow back through a stenotic valve can lead to turbulent blood flow, increased pressure in the heart chambers, and ultimately conditions like heart failure, arrhythmias, and ventricular hypertrophy.
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.