--subdivision Biodegradation under individual chemicals and groups of chemicals and individual materials and types of materials, e.g. Insulin--Biodegradation; Insecticides--Biodegradation; Metals--Biodegradation
--subdivision Metabolism under individual animals and groups of animals, individual chemicals and groups of chemicals, and individual organs and regions of the body, e.g. Cattle--Metabolism; Fishes--Metabolism; Copper--Metabolism; Heart--Metabolism
--subdivisions Molecular aspects and Growth--Molecular aspects under individual organs and regions of the body, e.g. Heart--Molecular aspects; Heart--Growth--Molecular aspects; and subdivision Molecular aspects under individual animals and groups of animals, e.g. Fishes--Molecular aspects