Animal body water

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Animal body water content varies with age of the animal. The older the vertebrate animal, the higher its relative bone mass and the lower its body water content. [1]


Water in the animal body performs a number of functions:

  • solvent for transportation of nutrients[1]
  • medium for excretion[1]
  • body heat control[1]
  • lubricant for joints[1]
  • shock absoption[1]


Most of body water is in various body fluids.

Per Netter's Atlas of Human Physiology, body water is broken down into the following compartments:[2]

  • Intracellular fluid
  • Extracellular fluid
    • Plasma
    • Interstitial fluid
    • Transcellular fluid
      • Contained inside organs, such as the gastrointestinal, cerebrospinal, peritoneal, and ocular fluids.

Adipose tissue contains about 10% of water, while muscle tissue contains about 75%.[3]


An immediate way of adding water to a body is drinking. In addition, water enters the body with food, especially rich in water, such as plants, raw meat, etc.

Of all animals, humans are most resourceful in ways of water intake.

See also[edit]


  1. 1.0 1.1 1.2 1.3 1.4 1.5 [1]
  2. John T. Hansen, Bruce M. Koeppen, (2002). Netter's Atlas of Human Physiology. Teterboro, N.J: Icon Learning Systems. ISBN 1-929007-01-9.CS1 maint: Multiple names: authors list (link) Search this book on Logo.png
  3. [2]

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