blood flows from the right ventricle when it passes through the semilunar valve and into the lungs.
blood flows from the right ventricle when it passes through the semilunar valve and into the lungs.
where does blood flow from when it passes through the semilunar valve and into the lungs?
the right ventricle
2- two semilunar valves to prevent the backflow of blood into the ventricle









































a) pulmonary semilunar valve, located at the opening between the right ventricle and the pulmonary trunk.









































b) aortic semilunar valve, located at the opening between the left ventricle and the aorta.









































section::::structure.:atrioventricular valves.









































these are the mitral and tricuspid valves, which are situated between the atria and the ventricles and prevent backflow from the ventricles into the atria during systole. they are anchored to the walls of the ventricles by chordae tendineae, which prevent the valves from inverting.
heart valve
the pulsatile nature of blood flow creates a pulse wave that is propagated down the arterial tree, and at bifurcations reflected waves rebound to return to semilunar valves and the origin of the aorta. these return waves create the dicrotic notch displayed in the aortic pressure curve during the cardiac cycle as these reflected waves push on the aortic semilunar valve. with age, the aorta stiffens such that the pulse wave is propagated faster and reflected waves return to the heart faster before the semilunar valve closes, which raises the blood pressure. the stiffness of the aorta is associated with a number of diseases and pathologies, and noninvasive measures of the pulse wave velocity are an independent indicator of hypertension. measuring the pulse wave velocity (invasively and non-invasively) is a means of determining arterial stiffness. maximum aortic velocity may be noted as v or less commonly as aov.
aorta