Sphincter
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| − | A '''sphincter''' is a ring of muscles inside the body that surrounds an internal or external opening and may close the opening by contraction. In a [[BDSM]] context, it usually refers to the [[anal sphincter]]. | + | A '''sphincter''' is a ring of muscles inside the body that surrounds an internal or external opening and may close the opening by contraction. In a [[BDSM]] context, it usually refers to the [[anus|anal sphincter]]. |
[[Category:Health]] | [[Category:Health]] | ||
Revision as of 18:46, 17 January 2009
A sphincter is a ring of muscles inside the body that surrounds an internal or external opening and may close the opening by contraction. In a BDSM context, it usually refers to the anal sphincter.
