. The anatomical record. Anatomy; Anatomy. 8 FRANK E. BLAISDELL, SR. absent and the fibro-elastic bundles were reduced to a mini- mum. It is therefore logical from an evolutionary standpoint to conclude that the presence of the recto-uterine muscle in these folds appears at an early date in the vertebrate series, and that they possess a phylogenetic significance. 1. GUINEA PIG In the guinea pig, two distinct peritoneal folds pass dorsally from the sides of the vagina to the sides of the rectum. They Htctani L'xcavitio pavarectdl Plica. Plica, reclo-vadinalis i-Excivatio reclo-va6
. The anatomical record. Anatomy; Anatomy. 8 FRANK E. BLAISDELL, SR. absent and the fibro-elastic bundles were reduced to a mini- mum. It is therefore logical from an evolutionary standpoint to conclude that the presence of the recto-uterine muscle in these folds appears at an early date in the vertebrate series, and that they possess a phylogenetic significance. 1. GUINEA PIG In the guinea pig, two distinct peritoneal folds pass dorsally from the sides of the vagina to the sides of the rectum. They Htctani L'xcavitio pavarectdl Plica. Plica, reclo-vadinalis i-Excivatio reclo-va6'ii\ Vagina Uterus Li^iTnentii-m latum I'ig. :i Drawing showing rectum, vagina, uterus, recto-vaginal pouch and recto-vaginal folds in guinea pig (Cavia cabayia). are therefore recto-vaginal folds, and must be termed the lat- eral folds to distinguish them from the median recto-vaginal reflection of peritoneum at the bottom of the recto-vaginal fossa. Lateral to the rectum and recto-vaginal fold is the para- rectal fossa, which is in turn bounded laterallj' by a peritoneal fold conveying utero-vaginal blood vessels. The lateral recto- vaginal folds and broad ligaments of the uterus are extremely thin and more or less transparent to translucent. By means of serial microscopical sections bimdles of smooth nmscle fibers. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bardeen, Charles Russell, 1871-1935, ed; Boyden, Edward A. (Edward Allen), 1886-1976; Bremer, John Lewis, 1874- ed; Hardesty, Irving, b. 1866, ed; American Association of Anatomists; American Society of Zoologists; Wistar Institute of Anatomy and Biology. [New York, etc. ] A. R. Liss [etc. ]
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectanatomy, bookyear1906
