Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Fish physiology refers to the study of the internal functions and structures of fish, including their respiratory, circulatory, digestive, and reproductive systems.
Related terms
Osmoregulation: The process by which fish regulate the balance of water and salts in their bodies.
Swim bladder: An internal gas-filled organ that helps fish control their buoyancy in water.
Gills: Respiratory organs in fish that extract oxygen from water.