Aortic insufficiency (AI), also known as aortic regurgitation (AR) is what is called when blood flows in the reverse direction during ventricular diastole, from the aorta into the left ventricle.
The aortic valve
The left ventricle pumps blood to the aorta
It comes from the left ventricle out through the aorta.
There are not valves in the pulmonary artery or the aorta. However there are valves between these and the heart. Between the right ventricle and the pulmonary artery there is a valve referred to as the pulmonary semilunar valve. Between the left ventricle and the aorta there is a valve called the aortic semilunar valve.
the left ventricle
You have aorta or systemic aorta that arise from your heart. This very big artery arise from the left ventricle. You have a big pulmonary aorta, that arise from your right ventricle. The systemic aorta is the bigger than pulmonary aorta. Although both of them carry the same amount of blood.
The Aorta is the biggest artery in the human body
left ventricle
The left ventricle of the heart.
Aorta
Left ventricle
The right ventricle pumps blood into the pulmonary artery.