White Blood Cell - A special type of cell that works as part of the immune system to defend the body against disease and infection.⏎
Skin Lesion - Any abnormal tissue on the skin caused by injury or disease.⏎
Toxin - A poisonous substance, often a protein, produced by the metabolic processes of living cells or organisms that can cause disease if introduced into the body.⏎
Species - One of the most basic units of biological classification, ranking just below the genus and comprising individuals or populations capable of interbreeding.⏎