Question

Mitral valve is found between
A. Right auricle and right ventricle
B. Left auricle and left ventricle
C. Right auricle and pulmonary artery
D. Left ventricle and aorta

Answer 1

Hint: There are four valves in the heart - one for each heart chamber. The valves prevent the blood flowing in the correct direction through the heart. The valves are constructed from solid, thin tissue flaps called leaflets or cusps.

Complete Answer:
The mitral valve and the tricuspid valve are found between the left auricle and left ventricle.
Between the ventricles and the main blood vessels exiting the heart, the aortic valve and pulmonic valve are located.
During half of the pulse, the leaflets open to let blood flow forward through the heart. They close during the other half of the heartbeat to prevent blood from flowing backwards.
There are only two leaflets in the mitral valve; there are three in the aortic, pulmonic and tricuspid valves. A ring of tough, fibrous tissue called the annulus is attached to and protected by the leaflets. The annulus helps to preserve the valve's proper shape.

The mitral and tricuspid valve leaflets are also provided by:
(I) Chordae Tendineae: tough fibrous strings. The strings supporting a parachute are identical to these.
(II) Papillary muscles: part of the ventricles' inner walls.
To prevent blood from flowing backwards, the chordae tendineae and papillary muscles keep the leaflets stable.

To let blood flow through the heart, the four valves must open and close.
- Open Tricuspid and Mitral Valves: Blood passes through the open tricuspid valve from the right atrium into the right ventricle, and through the open mitral valve from the left atrium to the left ventricle.
- Closed Tricuspid and Mitral Valves: The tricuspid valve closes when the right ventricle is complete and prevents blood from flowing backwards into the right atrium when the ventricle contracts (squeezes).
- When the left ventricle is complete, the mitral valve closes and stops blood from flowing backwards into the left atrium when the ventricle contracts.

The correct Answer is option (B)Left auricle and left ventricle.

Note: Also called a bicuspid valve.This is one of the four valves of the heart that helps keep blood from moving backwards as it passes through the heart. Blood rich in oxygen flows from the pulmonary veins into the left atrium. The mitral valve opens as the left atrium fills with blood, allowing blood to flow to the left ventricle.