Body orifice

A body orifice is any opening in the body of an animal.

External

In a typical mammalian body such as the human body, the external body orifices are:

Other animals may have some other body orifices:

  • cloaca, in birds, reptiles, amphibians, and some other animals
  • siphon in mollusk, arthropods, and some other animals

Internal

Internal orifices include the orifices of the outflow tracts of the heart, between the heart valves.

See also

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