After entering the left atrium, the blood goes through the second atrioventricular valve called the mitral valve into the left ventricle.

进入左心房后，血液穿过第二个房室瓣膜，称为二尖瓣，进入左心室。

This is the valve that separates the left atrium and the left ventricle.

这是分隔左心房和左心室的瓣膜。