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body orifice
A body orifice is any opening in the body of an animal.
==External orifices==
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, 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
* The urinary meatus, for urination and ejaculation
* In females, the vagina, for menstruation, sexual intercourse and childbirth
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
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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