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Noun: musculus sphincter ani internus
  1. An internal ring of smooth muscle formed by circular fibers of the rectum

Type of: involuntary muscle, smooth muscle

Part of: anal sphincter, musculus sphincter ani, sphincter ani

Encyclopedia: Musculus sphincter ani internus

Nearest

musculus pectoralis minor
musculus quadriceps femoris
musculus rhomboideus major
musculus rhomboideus minor
musculus sartorius
musculus scalenus
musculus serratus anterior
musculus serratus posterior
musculus sphincter ani
musculus sphincter ani externus
musculus sphincter ani internus
musculus sphincter ductus choledochi
musculus sphincter ductus pancreatici
musculus sphincter pupillae
musculus sphincter pylori
musculus sphincter urethrae
musculus sphincter vesicae
musculus sternocleidomastoideus
musculus temporalis
musculus teres major
musculus teres minor