Body systems

A small, rough, harmless growth on the skin caused by a human papillomavirus (HPV) infection.

A raised, red or pale, often itchy area on the skin; also called a wheal.

The name of a German neurologist, used in Wernicke encephalopathy (from low thiamine) and Wernicke aphasia (trouble understanding language).

A sudden, serious brain disorder that results from a severe lack of thiamine (vitamin B1).

A raised, red or pale, itchy bump on the skin that comes and goes; a single hive.

A high-pitched, whistling sound made as air moves through narrowed airways.

A blood cell that is part of the immune system and helps the body fight infection and other foreign material.

Tissue of the brain and spinal cord made mostly of nerve fibers (axons), white from their fatty myelin.

Donated blood with nothing taken out: red cells, plasma, platelets and clotting factors together, in a bag with an anticoagulant.

A grain that still has all three parts of the kernel, the bran, germ and endosperm.

A cancer of the kidney that develops in young children.

The physical and mental symptoms that occur when a person stops or cuts down a substance the body has come to depend on.

A break or injury in the skin or the tissue under it.

The body's process of repairing damaged skin and tissue.

A crease or fold, either in the skin or in fabric such as bed sheets.