See Also: musculus sphincter(medicine)
musculus sphincter pylori(medicine)
musculus sphincter vesicae(medicine)
musculus sphincter urethrae(medicine)
musculus sphincter pupillae(medicine)
musculus sphincter oris(medicine)
musculus sphincter vaginae(medicine)
musculus sphincter ani internus(medicine)
musculus sphincter ani externus(medicine)
musculus sphincter ampullae hepatopancreaticae(medicine)

musculus sphincter ani internus (medicine) and Oyl, Olive (oh)


musculus sphincter ani internus (medicine)


musculus sphincter ani internus -->
internal anal sphincter
<anatomy> A smooth muscle ring, formed by an increase of the circular fibres of the rectum, situated at the upper end of the anal canal, internal to the outer voluntary external anal sphincter.

This sphincter is maximally-contracted when the rectal ampulla is at rest -empty or relaxed to accommodate a distending faecal mass. It is inhibited with filling of the ampulla, increased distension and peristalsis.

Synonym: musculus sphincter ani internus, internal sphincter muscle of anus.


Oyl, Olive (oh)



a character in the US cartoon strip Television cartoons, and Film about Popeye . Olive Oyl is a tall very thin woman who is Popeye's girlfriend .