Question

Valves are present in ______.

Options

• artia, veins and ventricles 

• SA node, AV node and ateries

• pacemaker, veins and arteries

• All of the above

Answer 1

Valves are present in artia, veins and ventricles.

Explanation:

The valve is a tissue flap that only allows liquid to flow in one direction. A tricuspid valve protects the auriculo-ventricular apertures, which are located where the right atrium enters into the right ventricle. A bicuspid or mitral valve prevents the left atrium from entering the left ventricle. Semilunar valves in veins stop blood from flowing backward.