Question

Tricuspid valve is found in between:
A. Sinus venosus and right auricle
B. Right auricle and right ventricle
C. Left ventricle and left auricle
D. Ventricle and aorta

Answer 1

Hint: The valves are present between the upper and lower chambers on both sides of the mammalian heart. The primary function of the valves is to prevent the backflow of blood. There are a total of four valves present in the human heart.

Complete answer: Human heart is four-chambered. Two chambers are found on the right side of the heart while two are present on the left. The two upper chambers on respective sides are called atria while the lower chambers are called ventricles. The blood flows in one way from each chamber of the heart. The tricuspid valve is present on the right side of the mammalian heart. Its primary function is to prevent the backflow of blood from the right ventricle into the right auricle. The blood enters into the heart through two veins, known as the inferior vena cava and the superior vena cava, into the right atrium of the heart. Then the atrium contracts and blood flows from the right atrium into the right ventricle through the tricuspid valve. The tricuspid valve prevents the backflow of blood and shuts down when the ventricle is full. The blood further flows into the Pulmonary artery and is then transferred to the lungs for oxygenation.
Hence, the correct answer is option B.
Additional information:
The heart valves can suffer two types of malfunctioning:
1. Regurgitation (leaky valve)
2. Stenosis (narrowing of the valve)

Note: Tricuspid valve is also called the right atrioventricular valve. It has three leaflets, namely, anterior, posterior, and septal leaflets. The four valves present in the human heart are a mitral valve, a tricuspid valve, and two semilunar valves.