The semilunar valves ( the pulmonary and aortic valves ) are formed from four thickenings at the cardiac end of the truncus arteriosus.
22.
Once the lymph flows into the next lymphangion, it cannot return to the previous lymphangion, as the semilunar valves close tightly.
23.
The younger of which may be of Holocene age and is constructed in the middle of a caldera marked by a semilunar shape.
24.
Aranzi discovered the'Nodules of Aranzio'in the semilunar valves of the heart and wrote the first description of the superior levator palpebral and the coracobrachialis muscles.
25.
Its posterior wall is formed by the ventricular septum, which bulges into the right ventricle, so that a transverse section of the cavity presents a semilunar outline.
26.
It is semilunar in form, its convex border being continuous with the white substance of the cerebellum; it extends on either side as far as the flocculus.
27.
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.
28.
The fibrous rings surrounding the arterial orifices serve for the attachment of the great vessels and semilunar valves, they are known as The " aortic annulus ".
29.
*Isn't the simple answer here that tricuspid valves have three cusps and semilunar valves are shaped like a half moon ? talk ) 21 : 11, 6 October 2013 ( UTC)
30.
This short lasting phase, called " protodiastole " ends with the closure of the semilunar valves, producing the second Diastasis', and the'last rapid filling phase'due to atrial contraction ( systole ).
