Flaps of tissue that allow blood to flow in only one direction

Each flap is called a cusp,and forms a portion of a heart or venous valve.

It is very important to stay hydrated. your body needs it for may things for cells, tissues, your organs and etc. water also with your temperature that way you don’t get a headache etc. i bet if you look it up there will be a lot of things you can learn.

No because males don’t have reproductive organs dummy