The mitotic index is defined by the following ratio: [Number of cells undergoing mitosis]/[total number of cells present].

Identify three normal human adult cells/tissues in which the mitotic index is very high and three normal human adult cells/tissues in which the mitotic index is very low or zero.

For each, explain why the mitotic indices are very high or very low based on the physiology of that adult tissue/cell.

a.very high?

b.very low or zero?

very low or zero?