physiology vs. biology

physiology

noun

  1. the branch of biology dealing with the functions and activities of living organisms and their parts, including all physical and chemical processes.
  2. the organic processes or functions in an organism or in any of its parts.

biology

noun

  1. the science of life or living matter in all its forms and phenomena, especially with reference to origin, growth, reproduction, structure, and behavior.
  2. the living organisms of a region:

    the biology of Pennsylvania.

  3. the biological phenomena characteristic of an organism or a group of organisms:

    She is studying the biology of worms, especially in regard to their reproductive behavior.