. The American journal of anatomy . he lumen whichwill later become the prostatic furrows point in a horizontal direc-tion and at this period of development show no tendency to bedirected downward (fig. 1). In no portion of the prostatic urethra is there any thickening oftissue or outgrowth of epithelial cells indicating the developmentof prostatic gland tissue. There is no specific arrangement oftissue planes and it is not possible to pick out the exact site of the * 21 These measurements are all crown-rump and not crown-heel. 306 OSWALD S. LOWSLEY internal sphincter. Below the verum montanum
. The American journal of anatomy . he lumen whichwill later become the prostatic furrows point in a horizontal direc-tion and at this period of development show no tendency to bedirected downward (fig. 1). In no portion of the prostatic urethra is there any thickening oftissue or outgrowth of epithelial cells indicating the developmentof prostatic gland tissue. There is no specific arrangement oftissue planes and it is not possible to pick out the exact site of the * 21 These measurements are all crown-rump and not crown-heel. 306 OSWALD S. LOWSLEY internal sphincter. Below the verum montanum the urethrabecomes more or less star-shaped, indicating a collapsed circulartube. Fetus cm. long: {thirteen weeks) There is considerable change noted in the appearance of thebladder at this stage. Throughout its entire area the wall com-posing the base is thicker than at any other portion of its circum-ference, and the nearer one approaches the trigonal region thegreater is the thickness. The musculature of the bladder is dis-. Fig. 1 5 cm. human fetus two and three-fourths months. Prostatic portion ofurethra. tinctly made out as deeply staining tissue composed of circular,interlacing and longitudinal strands which are easily differentiatedfrom the connective tissue elements forming the major portion ofthe bladder wall. The strands of muscular tissue aie muchlarger and more abundant at the base or inferior portion than atany other. In the region just superior to the trigone where thebas-fond will later develop, the inferior wall is three times as thickas it is at any other part of the circumference. The mucous mem-brane is gathered in folds on the inferior interior surface of theorgan throughout its length, while elsewhere it is smooth. The trigonum vesicae is about five times as thick as the remain-ing portion of the vesical wall. The muscular strands composing THE HUMAN PROSTATE GLAND 307 it are much finer in texture than those found elsewhere and manyof them can be trac
Size: 2005px × 1246px
Photo credit: © Reading Room 2020 / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1910, booksubjectanatomy, bookyear1912
