Name three common type of valve abnormalities?

The heart made up of four valves that is tricuspid, pulmonary, mitral and aorta. The three major valve abnormalities are as follows :

Disturbance in the blood supply to the heart.

Oxygen supply to the heart.

Narrowing of the arteries.

The valve abnormalities should be treated as soon as possible otherwise it will be life-threatening for them and can be a reason of heart attack and strokes.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.