anal, canal

Porción terminal del canal alimentario; se distingue del recto por la transición de una capa de la membrana mucosa interna a una de un tejido similar a la piel y por su menor diámetro.

Los excrementos se desplazan desde el recto hacia el canal anal. El canal anal humano mide 2,5–4 cm (1–1,5 pulg.) de largo y está compuesto de tres partes: la superior, con pliegues longitudinales (columnas rectales); la inferior, con músculos constrictores involuntarios y voluntarios (esfínteres) que controlan la descarga de las heces y la abertura anal propiamente tal. La dilatación de los extremos de las venas rectales y anales se denominan hemorroides.

Enciclopedia Universal. 2012.

Mira otros diccionarios:

  • anal canal — n the terminal section of the rectum * * * the terminal portion of the large intestine, which is surrounded by the muscles of defecation (anal sphincters). The canal ends on the surface at the anal orifice (see anus). * * * canalis analis …   Medical dictionary

  • anal canal — End portion of the alimentary canal, distinguished from the rectum by the transition from an internal mucous membrane layer to one of skinlike tissue and by its narrower diameter. Waste products move from the rectum to the anal canal. The human… …   Universalium

  • Anal canal — Infobox Anatomy Name = PAGENAME Latin = canalis analis GraySubject = 249 GrayPage = 1184 Caption = Coronal section of rectum and anal canal. Caption2 = Coronal section through the anal canal. B. Cavity of urinary bladder V.D. Ductus deferens. S.V …   Wikipedia

  • anal canal — the terminal portion of the large intestine, which is surrounded by the muscles of defecation (anal sphincters). The canal ends on the surface at the anal orifice (see anus) …   The new mediacal dictionary

  • anal canal — /eɪnəl kəˈnæɛl/ (say aynuhl kuh nael) noun the end part of the rectum leading to the anus …   Australian English dictionary

  • anal canal — noun : the terminal section of the rectum …   Useful english dictionary

  • Канал Заднепроходный (Anal Canal) — конечная часть прямой кишки, окруженная мышцами сфинктерами (anal sphincters). Канал открывается на промежности анальным отверстием (см. Анус). Источник: Медицинский словарь …   Медицинские термины

  • The remaining material, solid waste called stool, moves through the colon, is stored in the rectum, and leaves the body through the anal canal and anus. — Having to do with the larynx …   English dictionary of cancer terms

  • Anal columns — Coronal section of rectum and anal canal. The interior of the anal cami and lower …   Wikipedia

  • Anal sphincterotomy — is a surgical procedure that involves treating mucosal fissures from the anal canal/sphincter. The word is formed from sphincter + otomy (to cut, to separate). Procedure # The surgery can be performed under any kind of anesthesia. # After… …   Wikipedia


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