Which valve lies between the right ventricle and the pulmonary artery?

The valve situated between the right ventricle and the pulmonary artery is the pulmonary valve. This valve plays a crucial role in the circulatory system by ensuring that blood flows in a one-way direction from the right ventricle into the pulmonary artery, which then carries deoxygenated blood to the lungs for oxygenation.

When the right ventricle contracts during systole, the pulmonary valve opens, allowing blood to exit the heart. Once the ventricle relaxes, the valve closes to prevent the backflow of blood into the heart. This function is vital for maintaining proper cardiac and respiratory function, allowing efficient oxygenation of blood during its passage through the lungs.

The other valves listed serve different functions within the heart; for example, the aortic valve controls blood flow from the left ventricle to the aorta, the mitral valve regulates blood flow between the left atrium and left ventricle, and the tricuspid valve manages blood flow from the right atrium to the right ventricle.