This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...of the testis (Fig. 210, a). As they approach the apex of a lobule several of these convoluted tubules unite to form (2) the straight tubule (Fig. 206, s, 210). This passes through the apex of the lobule to the mediastinum, where it unites with other straight tubules to form (3) the irregular network ...
Read More
This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1910 edition. Excerpt: ...of the testis (Fig. 210, a). As they approach the apex of a lobule several of these convoluted tubules unite to form (2) the straight tubule (Fig. 206, s, 210). This passes through the apex of the lobule to the mediastinum, where it unites with other straight tubules to form (3) the irregular network of tubules of the mediastinum, the rete testis (Fig. 210, c). 1. The Convoluted Tubule.--This, which may be considered the most important secreting portion of the lobule, since it is here that the spermatozoa are formed, has a diameter of from 150 to 250/!. The tubules begin, some blindly, others by anastomoses with neighboring tubules, near the periphery of the lobule, and pursue a tortuous course toward its apex (Fig. 210, a). The wall of the convoluted tubule (Fig. 208) consists of three Fig. 207.--Longitudinal Section through Human Testis and Epididymis. X 2. (Bohm and von Davidoff.) The light strands are connectivetissue septa, a, Tunica albuginca; 6, mediastinum and rete testis; c, head of epididymis; d, body of epididymis; e, lobule; s, straight tubules; t, vas epididymis. layers: (a) An outer layer composed of several rows of flattened connective-tissue cells which closely invest the tubule; (b) a thin basement membrane; and (c) a lining epithelium. The epithelium consists of two kinds of cells, the so-called supporting or sustentacula cells and the glandular cells proper, the spermatogenic cells. The sustentacular cells, or columns of Sertoli, are irregular, high, epithelial structures, whose bases rest upon the basement membrane, Fig. 208.--Cross Section of Convoluted Portion of Human Seminiferous Tubule. X 480. (Kolliker.) Id, Basement membrane; i, its inner homogeneous layer, /, its outer fibrous layer; s, nucleus of Sertoli cell;..
Read Less
Add this copy of A Text-Book of Histology to cart. $23.14, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
Add this copy of A Text-Book of Histology to cart. $34.31, new condition, Sold by Ingram Customer Returns Center rated 5.0 out of 5 stars, ships from NV, USA, published 2022 by Legare Street Press.
