The following is a list of the branches of biology, with definitions, pronunciations, and links to related topics.
Note, however, that there are so many subbranches within the general field of biology that they cannot be fully listed here. There are many named branches of the discipline that can be found in dictionaries, but that are little known and have few practitioners. The following list, then, attempts to name and define only the major fields:
Branches of biology dealing with microorganisms and microscopic structure:
Cytology (/sī-TALL-ə-jee/) — The study of living cells, in particular, their physiological properties, structures, organelles, and method of division.
Histology (/hist-TAWL-ə-jee/) — The study of the microscopic structure of cellular tissue.
Microbiology (/MIKE-rō-buy-AWL-ə-jee/) — The branch of biology that studies microorganisms and their effects on other organisms.
Palynology (/PAL-in-NAWL-ə-jee/) The study of fine organic particulate matter, such as pollen grains and spores, present in air, water or sedimentary deposits.
Protistology (/prō-tist-AWL-ə-jee/) — The study of protists.
Epidemiology (/EP-ə-DEE-mee-ALL-ə-gee/) — The study of the incidence of disease within populations, and of optimal measures for its control.
Esthesiology (/es-theez-ee-AWL-ə-jee/) — The scientific study of sensation.
Genetics (/jə-NET-iks/) — The study of heredity, especially the mechanisms of hereditary transmission and variation of inherited characteristics.
Immunology (/IM-yə-NAWL-ə-jee/) The study of the structure and function of the immune system, innate and acquired immunity, the bodily distinction of self from nonself, and laboratory techniques involving the interaction of antigens with specific antibodies.