Question

what is the function of the heart valves?
a to push blood
b to prevent the backflow of blood
c to stimulate the heart
d to give support to the heart

Explanation:

Heart valves are structures in the heart that open and close to allow blood to flow in one direction. When the heart contracts, the valves open to let blood pass through. When the heart relaxes, the valves close to prevent blood from flowing backward. This one - way flow is essential for the efficient circulation of blood throughout the body. For example, the mitral valve (bicuspid valve) between the left atrium and left ventricle prevents blood from flowing back into the left atrium when the left ventricle contracts.

Answer:

B. To prevent the backflow of blood