Question

Name the valve between the left atrium and the left ventricle and give its significance.

Answer 1

Hint: The human heart is a four chambered heart. It is divided into the right atria, the left atria, the right ventricle and the left ventricle. Each of these is further separated from each other with the help of walls and valves. The valve which is present between the left atrium and the left ventricle has two cusps.

Complete answer:
To solve the given question, we must first know about the anatomy of the heart.
We all are well aware of the fact that the heart is divided into four chambers. These chambers are separated from each other with the help of valves. These valves prevent the mixing of the oxygenated and the deoxygenated blood.
The valve between the left atrium and the left ventricle is known as the mitral valve or the bicuspid valve.
Hence, the correct answer to the question is mitral valve.
Function of mitral or bicuspid valve
The heart pumps oxygenated blood to the entire body while it collects deoxygenated blood from the body. The oxygenated blood is poured into the left atria through the pulmonary veins. The mitral valve closes so that the blood does not get poured into the left ventricle. The atria get filled with blood but the mitral valve remains closed. Now the atrial contraction takes place and the blood is forced into the ventricle. The mitral valves open and the blood gets filled in the left ventricle. When the left atrium has poured the blood into the ventricles, the ventricular contraction takes place. Blood is forced into the aorta. The mitral valves close so that the blood is not forced back into the atrium.

Hence, mitral valves play a crucial role in the pumping of blood.

Note: Here, it should be noted that the valve which separates the right ventricle from the right atrium is known as the tricuspid valve. It has three cusps. It acts in a similar manner as the bicuspid valve preventing blood from flowing back into the right auricle when the right ventricles contract.