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Human anatomy, including structure and development and practical considerations . ay measure 25 cm. (9>4 in.), oreven more, in circumference. The saccules are separated by deep creases, passingabout two-thirds around the gut, caused by a folding in of all the coats internal to thetwo bands of longitudinal muscular fibres. The folds form the valves of the rectum,to be describctl with its interior. In the male the ampulla extends against the backof the prostate and the lower part of the seminal vesicles and the terminal parts ofthe vasa deferentia, to all of which it is connected by areolar t

Human anatomy, including structure and development and practical considerations . ay measure 25 cm. (9>4 in.), oreven more, in circumference. The saccules are separated by deep creases, passingabout two-thirds around the gut, caused by a folding in of all the coats internal to thetwo bands of longitudinal muscular fibres. The folds form the valves of the rectum,to be describctl with its interior. In the male the ampulla extends against the backof the prostate and the lower part of the seminal vesicles and the terminal parts ofthe vasa deferentia, to all of which it is connected by areolar t Stock Photo
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Contributor:

The Reading Room / Alamy Stock Photo

Image ID:

2ANC5FW

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7.1 MB (337.6 KB Compressed download)

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Dimensions:

1529 x 1634 px | 25.9 x 27.7 cm | 10.2 x 10.9 inches | 150dpi

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Human anatomy, including structure and development and practical considerations . ay measure 25 cm. (9>4 in.), oreven more, in circumference. The saccules are separated by deep creases, passingabout two-thirds around the gut, caused by a folding in of all the coats internal to thetwo bands of longitudinal muscular fibres. The folds form the valves of the rectum, to be describctl with its interior. In the male the ampulla extends against the backof the prostate and the lower part of the seminal vesicles and the terminal parts ofthe vasa deferentia, to all of which it is connected by areolar tissue. A pocket ofperitoneum intervenes higher up, the walls of which, however, come in contact whenthe hollow organs are distended. In the female the end of the ampulla lies againstthe posterior wall of the vagina from about opposite the level of the os uteri to thejunction of the middle and lower thirds. There is above this a fold of peritoneumcorresponding to that of the male. Fio 1421. Glands of imi(.osaLevator ani Internal sphincter Longitudinal muscli, External sphincter. — Levator ani External sphincter Skin Anal glands Frontal section through anal canal Anal glandb The Anal Canal.—This part of the large intestine (pars analis recti) is situ-ated in the thickness of the pelvic floor and extends downward and backward. Itdiffers from the rest of the intestinal canal in having no lumen under ordinary cir-cumstances, when the sphincters surrounding it are contracted. The anus is thevery vaguely used name of the termination of the anal canal. It is deeply situatedbetween the nates, especially in the female ; its distance from the tip of the coccyx, variously stated by different observers, may be said to be about 5 cm. (2 in.).Much confusion has arisen from the difficulty of defining the lower end of the analcanal, since the skin, which is puckered up by the external sjihincter and the cor-rugator cutis ani, somewhat resembles mucous membrane, so that the canal aj^pearslong

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