The tricuspid valve has three little flaps, or cusps.

它有个小，或。

This one is called the tricuspid valve, and it allows blood into the right ventricle.

让血液得以进室。

Naomi Cline, 43, had her tricuspid valve replaced three years ago with a porcine valve, sir.

Naomi Cline，43岁，年前以猪生物膜行置换术。

But, unlike the tricuspid valve, the pulmonary valve doesn't have any of those chordae tendineae.

但与不同，肺动脉没有腱索。

So the first " lub" that you hear in that lub-DUB is made by the mitral and tricuspid valves closing.

所以你在 lub-DUB 中听到第一个“lub”是由二和关闭发出。

When the atria contracts, blood in the right atrium is forced through the tricuspid valve into the right ventricle.

当室收缩时，室血液经肺动脉进肺动脉，同时关闭防止血液回流至房。

And because it's basically the tricuspid and mitral valve closing, it's best heard in the tricuspid valve and mitral valve area.

因为它主要是因为二和关闭声音，所以它可以在二和听诊区被清晰听到。

And when the right atrium contracts, the blood passes through the tricuspid valve, into the relaxed right ventricle, and right back to where we started.

当房收缩时，血液通过，进放松室，回到我们开始地方。

Deoxygenated blood from the body enters the heart at the right atrium and passively travels past the tricuspid valve to fill the right ventricle.

来自身体脱氧血进房脏，被动地通过注室。

That being said, that contraction pumps the blood out the pulmonary valve, which just like the tricuspid valve has three cusps and also prevents blood from going backward.

也就是说，脏收缩将血液泵出肺动脉；与一样，肺动脉也有个，也可防止血液倒流。

Making our way down, between the fourth and fifth rib, next to the left lower border of the sternum, is where you can best hear the tricuspid valve closing.

让我们往下看，在第四肋及第五肋之间，紧靠左胸骨下缘，你可以清晰听到关闭声音。

For example, the right and left atria are both full of blood, and that blood moves through the tricuspid and the mitral valve to get down into the ventricles.

例如，房及左房充满了血；这些血将经从二及到室。

Right after the S2 sound, the tricuspid and mitral valves open back up allowing blood to fill up the ventricles again and this period of time is called diastole.

在S2之后，和二打开；让血液再次充盈室，这段时期叫做脏舒张期。

When the ventricle is filled, it contracts, forcing the tricuspid valve to close and forcing the blood through the pulmonary semilunar valve on its way to the lungs.

室充盈时，收缩，迫使关闭，迫使血液通过肺半月进肺部。

The impulses leap across synapse-like connections between the cells called gap junctions, and continue down the conduction system until they reach the atrioventricular node, or AV node, located just above the tricuspid valve.

这些脉冲跨越细胞之间称为间隙连接突触状连接，并沿着传导系统继续前进，直到它们到达位于正上方房室结或房室结。

On the other side of the heart, a tricusoid valve regurgitation has similar timing and shape, but it is loudest in the tricuspid area and the sound radiates up, along the left sternal border.

在脏另一边，反流有着相似时间和形状，但是在位置声音最大，沿着胸骨边缘向上放射。

That first heart sound, " lub" , is called S1, and the noise comes from the tricuspid and mitral valves snapping shut when the left and right ventricles contract, which happens at about the same time.

第一音“lub”叫做S1，是在左、室同时收缩，和二关闭时发出声音。

When the ventricles contract, blood in the right ventricle is forced through the pulmonary semilunar valve into the pulmonary artery; at the same time, the tricuspid valve closes to prevent the backward flow of blood into the atrium.

进肺动脉血液被运至肺，进行氧合过程，即与周围环境进行氧及二氧化碳（细胞一种代谢废物）交换。