Sentence Examples


  • Didelphia, the alternative name of the group was given in allusion to the circumstance that the uterus has two separate openings; while other features are the inclusion of the openings of the alimentary canal and the urino-genital sinus in a common sphincter muscle, and the position of the scrotum in advance of the penis.
  • The iris contains a sphincter and a dilator muscle; the former, supplied by branches from the oculomotorius nerve, is under control of the will, whilst the dilator fibres belong to the sympathetic system.
  • The third or outermost chamber, the proctodaeum, is closed externally by the sphincter ani; the orifice is quite circular.
  • The sphincter of Oddi surrounds the ampulla and prevents reflux of duodenal contents into the pancreatic duct.
  • The spasm of the internal anal sphincter can also restrict the blood supply to the anal skin, which reduces its ability to heal.

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