Method 3D reconstructions of undeformed thin serial anatomical sections of 4 females and 2 males 21—35y of the Chinese Visible Human database. Send a copy to your email. Anal canal and associated sphincters. Pelvic-floor anatomy is usually studied by artifact-prone dissection or imaging, which requires prior anatomical knowledge. Posteriorly, the anococcygeal ligament, a mesh of well-developed ligamentous tissue surrounding small adipose-tissue compartments, connected the EAS to the coccygeal bone Fig 2E. This content does not have an English version. The rectum, which is a continuation of the sigmoid colon, begins in front of the midsacrum the sacrum is the triangular bone near the base….
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Anatomy of Colon and Rectum

The extension of the anal canal is controversial among surgeons and anatomists. The anal sacs get compressed during defecation, which causes the fluid to be expressed. The serial-section approach settled contentious topographic issues of the pelvic floor. The number of people in the UK diagnosed with anal cancer has been increasing. Anteriorly, however, the conjoint longitudinal muscle could only be identified inferiorly, because more superiorly, thick fiber bundles of the longitudinal smooth muscle of the rectum did not follow the bend of the anorectal junction, but continued downward.
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Anal canal | Acland's Video Atlas of Human Anatomy

Posteriorly, the anococcygeal ligament, a mesh of well-developed ligamentous tissue surrounding small adipose-tissue compartments, connected the EAS to the coccygeal bone Fig 2E. The lateral layer consisted of discontinuous muscle sheets, which appeared to reinforce the medial layer locally and also attached to the rectococcygeal fascia Fig 1A and 1E. Call freephone or email us. The subcutaneous part surrounds the lowermost portion of the canal. Dis Colon Rectum 37—
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Nevertheless, considerable differences are noticed in modern anatomical atlases with respect to the architecture of the levator and sphincter ani complex, and the structures that affix the rectum to its surroundings. Inferior to the rectouterine or rectovesical recess, the rectum was a midline structure that was apposed to the vagina or prostate. Anteriorly, however, the conjoint longitudinal muscle could only be identified inferiorly, because more superiorly, thick fiber bundles of the longitudinal smooth muscle of the rectum did not follow the bend of the anorectal junction, but continued downward. Become a subscriber to watch this video. Serial sections 1—93 of the lesser pelvis of specimen CVH5. Views Read View source View history.
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The anatomy of the anus

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