Sphincter (disambiguation)

Last revised by Daniel J Bell on 25 May 2023

A sphincter (TA: musculus sphincter) is a term used in anatomy to refer a ring of muscle which narrows a tube or closes off a bodily orifice 1.

History and etymology

Sphincter is derived from the Greek word, σφιγγω (sphigo) which was used to refer to a cloak when it was worn tightly bound 1,2.

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