Urgent
2007-07-18 01:56:23 · 5 answers · asked by Achiever 1 in Science & Mathematics ➔ Biology
They are normally one way valves in the heart that allow blood to flow in the correct direction through the heart when the heart beats..
2007-07-18 01:58:55 · answer #1 · answered by DrB 7 · 0⤊ 3⤋
These valves regulate the flow of blood from one heart chamber to another.
You can learn a lot about the bicuspid and tricuspid valves (really, the mitral valve) here: http://en.wikipedia.org/wiki/Mitral_valve
2007-07-18 09:01:02 · answer #2 · answered by Stuart 7 · 3⤊ 0⤋
1. The bicuspid valve links the left atrium and the left ventricle. It opens during left atria systole (contraction) to allow blood to flow in from the left atrium to the left ventricle. It snaps shut during left ventricle systole to prevent back flow into the left atria when the left ventricle pumps blood out into the body via the aorta.
2. The tricuspid valve links the right atrium and the right ventricle. Like the bicuspid valve, it opens during right atria systole to allow blood flow into the right ventricle from the right atrium. Additionally, it snaps shut during right ventricle systole to prevent back flow of blood into the right atrium as the right ventricle pumps blood into the lungs to be oxygenated.
2007-07-18 10:43:52 · answer #3 · answered by Anonymous · 3⤊ 0⤋
They are involved in the regulation of the unidirectional flow of blood in the heart.
2007-07-18 11:14:09 · answer #4 · answered by Vytheeshwaran V 4 · 0⤊ 0⤋
they prevent the back flow of blood.Or you could say they make sure blood flows in one direction.
2007-07-18 09:07:25 · answer #5 · answered by tbaz4us 2 · 1⤊ 0⤋