Dictionary > Atrioventricular valve

Atrioventricular valve

noun, plural: atrioventricular valves
The heart valve between the upper atrium and the lower ventricle, and comprised of the mitral valve and the tricuspid valve
The atrioventricular valve is one of the two types of heart valves in humans. The other is called semilunar valve. There are two atrioventricular valves in a human heart. These two are located between the upper atria and the lower ventricles. Each of them is comprised of the mitral valve and the tricuspid valve.
The mitral valve (also called bicuspid valve and left atrioventricular valve) is located between the left atrium and the left ventricle of the heart. It has two triangular flaps of tissues that open to allow blood flow into the left ventricle. When closed, it prevents the back flow of blood from the left ventricle into the left atrium.
The tricuspid valve (also called right atrioventricular valve) is the valve located on the right side of the heart between the right atrium and the right ventricle. It is the heart valve that opens to allow the passage of blood into the right ventricle and closes to prevent the back flow of blood into the right atrium.
See also:

You will also like...

green leaf - close up view

Leaves are the major photosynthetic organ of a plant. Apart from that, they are also crucial to water movement. In this ..

IQ, Creativity and Learning
IQ, Creativity and Learning

Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

Evolution of Life - Ancient Earth
Evolution of Life – Ancient Earth

Autotrophs flourished, absorbing carbon and light. Soon after, primitive life forms that could assimilate oxygen thrived..

Water Cycle
The Water Cycle

The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..

Chromosome Mutations
Chromosome Mutations

Mutations can also influence the phenotype of an organism. This tutorial looks at the effects of chromosomal mutations, ..

Independent Assortment and Crossing Over
Independent Assortment and Crossing Over

This tutorial describes the independent assortment of chromosomes and crossing over as important events in meiosis. Read..