Women Anus Rectum Picture

Anorectal Images

Bladder

Peritoneal reflection

Valve of Houston

Rectum

Anorectal junction

Prostate

MEDIAN SECTION—VIEW FROM THE LEFT SIDE

Prostate

MEDIAN SECTION—VIEW FROM THE LEFT SIDE

Bladder

Peritoneal reflection

Valve of Houston

Rectum

Anorectal junction

Anorectal canal

The anal canal is demarcated from the rectum superiorly by a serrated line marking the change from skin to mucous membrane. This anorectal junction, often called the pectinate or dentate line, also denotes the boundary between somatic and visceral nerve supplies. It is readily visible on proctoscopic examination, but is not palpable.

Above the anorectal junction, the rectum balloons out and turns posteriorly into the hollow of the coccyx and the sacrum. In the male, the three lobes of the prostate gland surround the urethra. The two lateral lobes lie against the anterior rectal wall, where they are readily palpable as a rounded, heart-shaped structure about 2.5 cm in length. They are separated by a shallow median sulcus or groove, also palpable. The third, or median, lobe is anterior to the urethra and cannot be examined. The seminal vesicles, shaped like rabbit ears above the prostate, are also not normally palpable.

Digital Rectal Examination Female
CORONAL SECTION OF THE ANUS AND RECTUM. VIEW FROM BEHIND, SHOWING THE ANTERIOR WALL

In the female, the uterine cervix can usually be felt through the anterior wall of the rectum.

The rectal wall contains three inward foldings, called valves of Houston. The lowest of these can sometimes be felt, usually on the patient's left. Most of the rectum that is accessible to digital examination does not have a peritoneal surface. The anterior rectum usually does, however, and you may reach it with the tip of your examining finger. You may thus be able to iden-

Qy the tenderness of peritoneal inflammation or the nodularity of peritoneal etastases.

-jÉ Changes With Aging e prostate gland is small during boyhood, but between puberty and the e of about 20 years it increases roughly five-fold in size. Starting in about e 5th decade, further enlargement is increasingly common as the gland becomes hyperplastic (see p._).

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  • pamala
    Where is the anus located in a woman?
    3 years ago

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