Anala I

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Anala I

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Synonyme:
Pars analis recti, Analteil des Mastdarms
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Synonyme:
Pars analis recti, Analteil des Mastdarms
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Synonyme:
Arteria rectalis superior, Arteria haemorroidalis superior
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Epithelium stratificatum squamosum cornificatum


Mehrschichtig verhorntes Plattenepithel

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Autor:
Achudhan Karunaharamoorthy
•


Geprüft von:
Claudia Bednarek



Zuletzt geprüft: 7. April 2022



Lesezeit: 6 Minuten


Der Analkanal (Canalis analis) ist der letzte Abschnitt des Magen-Darm-Trakts. Er ist 3-4 cm lang und liegt komplett extraperitoneal . Er beginnt an der Junctio anorectalis distal der Flexura perinealis und endet am Anus.
Der Analkanal lässt sich makroskopisch in die Zona columnaris, Zona alba und Zona cutanea unterteilen.
Auf Grund des unterschiedlichen embryologischen Ursprungs der Zonen (Zona columnaris aus dem Enddarm, Zona alba und cutanea aus der Kloake) unterscheiden sich auch ihre versorgenden Strukturen. Die Linea dentata stellt hierbei eine wichtige Orientierungslinie dar.
Im Analkanal geht die Darmschleimhaut (Zona colorectalis) über eine Übergangzone (Zona transitionalis) in Analschleimhaut (Zona alba) und schließlich in Perianalhaut (Zona cutanea) über.
Der Analkanal ist ein wichtiger Bestandteil des Kontinenzorgans . Er ist umgeben vom muskulären Sphinktersystem , welches das Lumen geschlossen hält. Der M. sphincter ani internus ist durch den Sympathikotonus permanent kontrahiert und wird unter parasympathischem Einfluss gelockert . Der M. sphincter ani externus umgibt den Analkanal wie eine Klemme. Er steht in enger Beziehung zum M. puborectalis (Teil des M. levator ani ), der das Rectum von hinten umschließt (Puborektalschlinge) und somit einen Knickverschluss bildet. Sowohl der M. sphincter ani externus als auch der M. puborectalis sind willkürlich innervierbar 
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Das Corpus cavernosum ani spielt eine wichtige Rolle in der Feinkontrolle . In der Ruhephase ist es mit arteriellem Blut gefüllt. In der Defäkationsphase erschlafft der innere Sphinktermuskel, wodurch das Blut in den Schwellkörpern abfließt und der Stuhl den Analkanal problemlos passieren kann. Eine pathologische Vergrößerung des Corpus cavernosum ani führt zu Hämorrhoiden .Die Proktodealdrüsen des Menschen sind rudimentär. Die von ihnen produzierten Duftstoffe spielen keine Rolle mehr. Bei vielen Tieren übernehmen sie noch wichtige Funktionen, z.B. zur Reviermarkierung oder sexuellen Anregung des anderen Geschlechts.
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Anatomie lernen ist eine gewaltige Herausforderung und wir wollen dir dabei helfen, sie mit Bravour zu meistern.

Mit Schleimhaut ausgekleidetes Lumen des Anus und letzter Abschnitt des Magen-Darm-Trakts

Zona columnaris, Zona alba, Zona cutanea

Arterien : A. rectalis superior,

Venen : Durch den Plexus haemorrhoidalis internus über die V. rectalis superior in den Portalkreislauf


Sympathisch : Plexus mesentericus inferior

Parasympathisch : Nn. splanchnici pelvici und Plexus hypogastricus inferior


- Wichtiger Bestandteil des Kontinenzorgans

- Gewährleistung von Kontinenz und Defäkation


aus Wikipedia, der freien Enzyklopädie
Wiktionary: anal – Bedeutungserklärungen, Wortherkunft, Synonyme, Übersetzungen

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If there is anyone out there who still considers anal sex taboo, please revisit your feelings because it's a normal, natural, and intimate part of many people's relationships. But, because movies tend to be a few steps behind when it comes to sex/nudity (lest they be slapped with a dreaded NC-17), anal isn't often shown in films—even in non-explicit ways. So when it is featured, it's a big deal, one that deserves a round of applause emojis. Here, a few films that embraced anal sex:
Note: Last Tango in Paris has been purposefully excluded from this list due to the lack of consent (opens in new tab) during the film's famed anal sex scene.
In 2018's surreal, neo-noir mystery Under the Silver Lake , Andrew Garfield and Riki Lindhome share a love scene that many on the internet have interpreted as representing anal sex. 
Kate Winslet also had a scene of (at very least implied) anal sex in Little Children, in which she and Patrick Wilson play two people who engage in a steamy affair while their respective spouses are away at work.
Wet Hot American Summer is one of the greatest cult comedies of all time (it's on Netflix, FYI, watch it immediately), and features an anal sex scene between Michael Ian Black and Bradley Cooper's characters. "I remember we kept our socks on. The big tube socks," Cooper said (opens in new tab) of the scene. "We put a lot of that sweat stuff, you know, that glistening gel. And then we were up against—yeah, it was nuts... The joke of that scene was to make it the one serious scene in the whole movie."
Silver has what *appears* to be an anal sex scene between Sharon Stone's and William Baldwin's characters, but it's slightly hard to tell by the positioning—they do it standing up against a giant pillar. If they aren't doing anal, whoever choreographed the scene didn't do a great job with um, penis placement.
Madonna and Willem Dafoe starred in a hiiiiiighly sex-packed movie together—about the sadomasochistic relationship between a woman and her lawyer. Body of Evidence features an anal sex scene, which—like other scenes in the film—incorporates handcuffs. Head's up, it's slightly uncomfortable to watch Madonna's character go from pain to pleasure, and the lines of consent seem somewhat blurred towards the beginning of the scene (she's trying to cuff him, and he ends up cuffing her).
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