--subdivision Phylogeny under individual animals and groups of animals and individual organs and regions of the body, e.g. Fishes--Phylogeny; Heart--Phylogeny
--subdivision Physiological aspects under activities and mental conditions for works on the relationship between an individual's activity or mental state and his physiology, e.g. Soccer--Physiological aspects; Mental illness--Physiological aspects; also subdivision Physiological effect under individual chemicals and groups of chemicals, individual materials and types of materials, individual plants and groups of plants, and under environmental phenomena or conditions for works on their effect on the functions of living organisms, e.g. Copper--Physiological effect; Heat--Physiological effect; also subdivision Physiology under individual animals and groups of animals, organs and regions of the body, classes of persons, and ethnic groups, e.g. Fishes--Physiology; Heart--Physiology; and subdivisions Embryos--Physiology and Larvae--Physiology under individual animals and groups of animals, e.g. Cattle--Embryos--Physiology; Fishes--Larvae--Physiology
Here are entered popular works containing chiefly pictures and photographs of animals. Scientific works consisting exclusively or predominantly of pictures without a significant amount of text are entered under Zoology--Pictorial works.
