Anatomy - the study of structure and shape of the body and its parts.

Cytology - the study of structure and function of the cell.

Histology - this is study of microscopic anatomy of a cell in animals.

Morphology - the study about external structure of an animal.

Embryology - the study the development of gametes and embryo, and its fertilization.

Genetics - the study of genes, genetic variation, and heredity in living organisms.

Ontogeny - this is the study of development of an individual from birth to its death.

Animal Physiology - the study about the functions and mechanisms of an animal.

Animal Behavior / Ethology - the study about social behavior of an animal.

Protozoology - the study of protzoa

Entomology - the study of insects

Conchology - the study of shell organisms

Malacology - the study of mollusks

Herpetology - the study of reptiles and amphibians

Ornithology - the study of birds

Helminthology - the study of worms

Ichthyology - the study of fishes

Parasitology - study about parasites.

Pathology - the study of disease.

Zoogeography - concerned with the geographic distribution of animal species.

Ecology - the study between the relationship of living and non-living organisms.

Paleontology - the study about prehistoric animals and their fossils and remains.

Phylogeny - the study about the origin of the species

Evolution - the origin of a certain organism.

Molecular Zoology - the study about the animal kingdom from its structure, evolution, habits, and how they correlated to each other.