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Functional opening in the body of an organism
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:
- The
nostrils, for
breathing and the associated sense of
smell
- The
mouth, for
eating,
drinking, breathing, and vocalizations such as
speech
- The
ear canals, for the sense of
hearing
- The
nasolacrimal ducts, to carry tears from the
lacrimal sac into the
nasal cavity
- The
anus, for
defecation
- In
males, the
urinary meatus, for
urination and
ejaculation
- In
females, the
urinary meatus, for
urination
- In
females, the
vagina, for
menstruation,
copulation and
birth
- The
nipple orifices
Other animals may have some other body orifices:
Internal
Internal orifices include the orifices of the outflow tracts of the heart, between the
heart valves.
See also
References