Identifier: quainselementsof82quai02 (find matches)
Title: Quain's elements of anatomy
Year: 1882 (1880s)
Authors: Quain, Jones, 1796-1865 Thomson, Allen, 1809-1884 Sharpey-Schäfer, E. A. (Edward Albert), Sir, 1850-1935, ed Thane, George Dancer, 1850-1930
Subjects: Human anatomy Anatomy
Publisher: London : Longmans, Green
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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The Eectum.—The lowest portion of the large intestine, named therectum, extends from the sigmoid flexure of the colon to the anus, and issituated entirely within the true pelvis, in its back part (fig. 538, r, r). Commencing opposite the left sacro-iliac articulation, it is directedat first obliquely downwards, and from left to right, to gain the middleline of the sacrum. It then changes its direction, and curves forwardsin front of the lower part of the sacrum and the coccyx, and behindthe bladder, vesicute seminales and prostate in the male, and at theback of the cervix uteri and vagina in the female. Opposite the THE EECTUM. 617 prostate it makes another turn, and inclines downwards and backwardsto reach the anus. Seen from the front, the upper part of the rectumpresents a lateral inclination from the left to the median line of thepelvis, sometimes passing beyond the middle to the right ; and whenviewed from the side (fig. 538), it offers two curves, one corresponding- Fig. 538,
Text Appearing After Image:
Fig. 538.—Vertical section of the pelvis and its viscera in the male(Allen Thomson, after Houston). ^ This figure is introduced to illustrate the form, position, and relations of the rectum ;it also shows the bladder and urethra with the pelvic inflection of the peritoneum overthese viscera : r, r, r, the iipper and middle parts of the rectum, and at the middleletter the fold separating the two ; r, a, the lower or anal portion ; v, the upper jjart ofthe urinary bladder ; v, the base, at the place where it rests more immediately on therectum ; p, the prostate gland and prostatic portion of the urethra ; h, the bulb ; c, c,the corpus cavernosum penis and suspensory ligament ; sc, the scrotum.; s, symphysispubis. with the hollow front of the sacrum and coccyx, and the other at thelower end of the bowel, forming a shorter turn in the opposite direction. The vnfestinum rectum, therefore, so called from its original description being-derived from animals, is far from being- straight in t

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