Manual of human and comparative histology v. 1 1870 Volume 1

by Books Group

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1870 ...and provided with small teeth, or prolonged into fine partly solid and partly hollow funnel-like and, for the most part, nonnucleated pointed processes. The substance of these is always more granular than that of the rest of the membrane. Such lateral processes are found also in adult animals, Strickerf having seen them in the nictitating membrane of the Uber contractile Klappensacke an den Venen dee Menschen, Deutsche Klinik, iii., p. 32, 1856. f Sitzungsberichte der Wiener Akademie, Band xii. Frog, whilst I have also observed them in the hyaloid. Threads of a similar nature occasionally form connecting bridges between neighbouring vessels. The diameter of these processes is often far less than that of the capillary from which they spring, and is insufficient for the passage even of a single blood corpuscle. These outgrowths, which act as vasa serosa, and as the youngest sprouts of growing capillaries, render it highly probable that even in adult animals a new formation of vessels occurs, though, perhaps, only to a limited extent. In many and especially in large recently formed capillaries, whether produced under normal or under pathological conditions, as, for example, in the membrane capsulo-pupillaris, the wall may be almost immediately broken up into finely granular fusiform protoplasmic masses. A similar cellular structure may be rendered apparent in the Fig. 49. Fig. 49. Capillaries from the membrana hyaloidea of the adult Frog, showing a thread-like solid anastomosis between them, a b, cells belonging to the tunica adventitia. capillaries of adult animals by various modes of preparation. Thus Klebs observed that in the urinary bladder of the Frog, after treatment with phosphate of soda, the nuclei of the capillaries were invested by a cloudy layer o...

212 pages, Paperback

Published January 1, 2012