When the body requires calcium, it takes it from bones. Describe the process and name the cells that are involved (2 points).

What is the periosteal bud, where do we find it?

Name the four principal types of cells in the epidermis.

What is the function of the matrix in nails?

Name the four prominent sutures of the skull.

The antibody active in agglutination or clumping of antigens is ______.

A cancer of the white blood cells is called ______.

The auditory tubes ______.

There are ______ subtypes of T cells recognized to participate in the immune response.

The ________ valve prevents backflow of blood from the aorta into the ________ ventricle.