PATHOLOGY

Detailed explanation-1: -Other types of differentiated cells, including blood cells, epithelial cells of the skin, and the epithelial cells lining the digestive tract, have short life spans and must be replaced by continual cell proliferation in adult animals.

Detailed explanation-2: -The epidermis is continually renewed from stem cells, with a turnover time, in humans, of the order of a month.

Detailed explanation-3: -Leucocytes are generally short lived. We have two main categories of WBCs-granulocytes and agranulocytes. Neutrophils, eosinophils and basophils are different types of granulocytes, while lymphocytes and monocytes are the agranulocytes.

Detailed explanation-4: -Skin cells are continuously replaced by the process called mitosis. In humans, billions of body cells die every day.

Detailed explanation-5: -In cellular biology, labile cells are cells that continuously multiply and divide throughout life. This continual division of labile cells allows them to reproduce new stem cells and replace functional cells that are lost in the body.