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It may be difficult to align both cardiac chambers in the same tracing; instead, the cursor can be placed across an atrial wall and a semilunar valve.
Malformations of the semilunar valves produced in chick embryos by mechanical interference with cardiogenesis.
The fourth stage, ventricular ejection, is when the ventricles are contracting and emptying, and the semilunar valves are open.
The conus arteriosus has a variable number of semilunar valves.
It is placed above and to the left of the atrioventricular opening, and is guarded by the pulmonary semilunar valves.
Its orifice is guarded by the aortic semilunar valves.
The aortic and pulmonary semilunar valves separate the left and right ventricle from the aorta and the pulmonary arterty respectively.
The aortic valve and the pulmonary valve are the two semilunar valves of the heart.
This results in the slight increase in aortic pressure caused by the elastic recoil of the semilunar valves and aorta.
These two arteries receive blood from the ventricles and their semilunar valves permit blood to be forced into the arteries, and prevent backflow from the arteries into the ventricles.
Flow through both semilunar valves is monophasic in systole.
The semilunar valves are directed towards the flow of the lymph and open when the pressure in the first lymphangion is greater than the pressure in the next lymphangion.
