Rectal venous plexus

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Vein: Rectal venous plexus
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Scheme of the anastomosis of the veins of the rectum.
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The veins of the right half of the male pelvis.
Latin plexus venosus rectalis, plexus haemorrhoidalis
Gray's subject #173 676
Drains to superior rectal vein
Dorlands
/ Elsevier
    
p_24/12648664

The hemorrhoidal plexus (or rectal venous plexus) surrounds the rectum, and communicates in front with the vesical plexus in the male, and the uterovaginal plexus in the female.

A free communication between the portal and systemic venous systems is established through the hemorrhoidal plexus.

Parts

It consists of two parts, an internal in the submucosa, and an external outside the muscular coat.

Internal plexus

The internal plexus presents a series of dilated pouches which are arranged in a circle around the tube, immediately above the anal orifice, and are connected by transverse branches.

External plexus

Support

The veins of the hemorrhoidal plexus are contained in very loose, connective tissue, so that they get less support from surrounding structures than most other veins, and are less capable of resisting increased blood-pressure.

This article was originally based on an entry from a public domain edition of Gray's Anatomy. As such, some of the information contained herein may be outdated. Please edit the article if this is the case, and feel free to remove this notice when it is no longer relevant.


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