Mitral Valve – Anatomy, Function & Area – Human Anatomy | Kenhub

Mitral Valve – Anatomy, Function & Area – Human Anatomy | Kenhub


Hey, everyone! This is Matt from Kenhub. The valves of the heart serve the cardiovascular
system by controlling the direction of the blood flow during circulation and determining
the exact moment in which the blood passes between the chambers of the heart as well
as in and out of it entirely. In this tutorial, we will specifically explore the anatomy,
function, and area of the mitral valve or bicuspid valve. The mitral valve is one of two atrial ventricular
valves. Its name comes from the fact that it is comprised of two cusps which, together,
look like a bishop’s hat, called a miter. It is situated between the left atrium and
the left ventricle. The atrioventricular valves attach to the
ventricular walls via the chordae tendineae which in turn attach to the papillary muscles
so that the cusps are held tense and don’t invert into the atria. This extended attachment
of the chordae tendineae and the papillary muscles is known as the subvalvular apparatus. The mitral valve has an anterior and a posterior
cusp. The cusps are named according to their position on the individual valve. So when
referring to the cusps, it’s important to identify which valve it belongs to. The valves of the heart control the blood
flow in and out of the heart, specifically the atrioventricular valves function to prevent
the backflow of blood from the ventricles to the atria during cardiac systole. Opening and closing of the valves is governed
by the gradient pressure across the valves themselves, and the first heart sound can
be heard when the atrial ventricular valves close. When you here the classic “lub-dub”
sound the heart makes, the mitral valve is contributing to the “lub” sound. This video is more fun than reading a text
book, right? If you want more videos, interactive quizzes, articles, and an atlas of human anatomy,
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