ANATOMY

Detailed explanation-1: -The aortic valve prevents backward flow from the aorta into the left ventricle.

Detailed explanation-2: -After contraction of the left ventricle, back pressure closes the aortic valve and prevents the back flow of blood from the aorta into the ventricle.

Detailed explanation-3: -Aortic Valve Separates the left ventricle from the aorta. Opens to allow blood to leave the heart from the left ventricle through the aorta and the body. Prevents the backflow of blood from the aorta to the left ventricle.

Detailed explanation-4: -When the left ventricle relaxes, the aortic valve closes and the mitral valve opens. This lets blood flow from the left atrium into the left ventricle.

Detailed explanation-5: -semilunar valve, either of two pocketlike half-moon-shaped structures located between the left ventricle and the aorta (aortic valve) and between the right ventricle and the pulmonary artery (pulmonary valve) of the heart.