Why the bicuspid valves have 2 flaps and the tricuspid valves have 3 flaps?!
Question: Why the bicuspid valves have 2 flaps and the tricuspid valves have 3 flaps!?
Answers:
Seem's like no one wants to answer your question!. I'm assuming that you already know that the mitral valve has 2 cusps and the tricuspid valve has 3 cusps and really your question is either "why did god make the mitral and tricuspid valves the way they are," or "what is the evolutionary/practical significance of having a 2 cuspid valve on the left side and a 3 cuspid valve on the right side!.
It's actually a very interesting question, and I posted a link that tries to answer your question:
http://www!.madsci!.org/posts/archives/199!.!.!.
I'll do my best at summarizing below!.
During embryological development, while the heart is still being formed, there are a number of unique features!.!.
1!. There a direct communication between the right and left atrium (foramen ovale)!. This allows placental oxygenated blood to directly enter the left side and then to the rest of the body!.
2!. During development, there is no barriers between the atria and ventricles!. Rather, the communication between the two chambers is called the atrioventricular canal, and the walls of these canals are called the endocardial cushions!.
3!. It is thought that as blood flows from the right atria to the left atria, the central endocardial cushion bulges toward the left as well!.
In so many words, this asymmetry and bulging causes fusion of what have been 3 cusps into 2 cusps on the left side!. Whereas on the right side, the absence of an endocardial bulge allows all the cusps to separate independently!.
I don't know if this is the only hypothesis, but check out the link, it provides a better explanation than I did above!.
Hope this helps!Www@Answer-Health@Com
It's actually a very interesting question, and I posted a link that tries to answer your question:
http://www!.madsci!.org/posts/archives/199!.!.!.
I'll do my best at summarizing below!.
During embryological development, while the heart is still being formed, there are a number of unique features!.!.
1!. There a direct communication between the right and left atrium (foramen ovale)!. This allows placental oxygenated blood to directly enter the left side and then to the rest of the body!.
2!. During development, there is no barriers between the atria and ventricles!. Rather, the communication between the two chambers is called the atrioventricular canal, and the walls of these canals are called the endocardial cushions!.
3!. It is thought that as blood flows from the right atria to the left atria, the central endocardial cushion bulges toward the left as well!.
In so many words, this asymmetry and bulging causes fusion of what have been 3 cusps into 2 cusps on the left side!. Whereas on the right side, the absence of an endocardial bulge allows all the cusps to separate independently!.
I don't know if this is the only hypothesis, but check out the link, it provides a better explanation than I did above!.
Hope this helps!Www@Answer-Health@Com
as the name says bicuspid means 2 and 3 structure of valves in the heart!. bicuspid valves prevents the backflow of blood from the left ventricle!. because there are two ventricles in the heart, left and right!. the left one consist of oxygenated blood and the right one consist of deoxygenated blood so it will not mix up thru the present of bicuspid and tricuspid valve!.Www@Answer-Health@Com
They are named so after the number of cusps (flaps) they have!. Bi means two and tri means three!. When there is only one cusp due to a birth defect, it becomes unicuspid valve!. (uni means single)!. Some abnormal valves have four cusps and then theyare said to be quadricuspid (quadri means four)!.Www@Answer-Health@Com
try having one of thoses valves replaced i did (april 7th 2005
1,128 days ago )Www@Answer-Health@Com
1,128 days ago )Www@Answer-Health@Com
Bi = 2
Tri = 3
DUH!.Www@Answer-Health@Com
Tri = 3
DUH!.Www@Answer-Health@Com