Question

Blood moves from the atria to the ventricles through which valves?

1- Semilunar valves

2- Aortic valves

3- Atrioventricular valves

4- Ventricular valves

Answer 1

Blood moves from the atria to the ventricles through the atrioventricular valves, which are the tricuspid valve on the right and the mitral valve on the left of the heart. Therefore, the correct answer is 3.

Step-by-step explanation:

Blood moves from the atria to the ventricles through the atrioventricular valves. This includes the tricuspid valve on the right side of the heart and the mitral (or bicuspid) valve on the left side. During the cardiac cycle, when the atria contract, these valves are open, allowing blood to flow from the atria into the ventricles. The semilunar valves, which include the aortic and the pulmonary valves, serve a different function, preventing backflow from the arteries into the ventricles during ventricular contraction.

To clarify further, option 3 - Atrioventricular valves is the correct answer to the question 'Blood moves from the atria to the ventricles through which valves?'. The semilunar valves are not involved in this particular movement of blood within the heart. Instead, they are found where blood leaves the heart, with the aortic semilunar valve located between the left ventricle and the aorta, and the pulmonary semilunar valve between the right ventricle and the pulmonary artery.

Answer 2

The correct answer is: 3- Atrioventricular valves

Heart valves are structures in heart that allow blood flow in only one direction. The valves of heart can be divided in two groups:

1. Atrioventricular valves (AV valves), located between atria and ventricle and they prevent backflow of blood from the ventricles into the atria.

• Mitral valve-between left atrium and left ventricle

• Tricuspid valve-between right atrium and right ventricle

2. Semilunar valves (SL valves) located between ventricles and arteries and they prevent the backflow of blood into the ventricle

• Pulmonary semilunar valve- between the right ventricle and the pulmonary trunk

• Aortic semilunar valve - between the left ventricle and the aorta