File:Kirkes' handbook of physiology (1907) (14746819896).jpg

Identifier: kirkeshandbookof00kirk (find matches)
Title: Kirkes' handbook of physiology
Year: 1907 (1900s)
Authors: Kirkes, William Senhouse, 1823-1864 Greene, Charles Wilson, 1866-1947
Subjects: Physiology
Publisher: New York, W. Wood and company
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
miniature, consisting, as it does, of a branch of the bronchialtube, of air-cells, blood-vessels, nerves, and lymphatics, with a small amountof areolar tissue. 250 RESPIRATION On entering a lobule, the small bronchial tube, the structure of whichhas just been described, a, figure 210, divides and subdivides; its walls atthe same time becoming thinner and thinner, until at length they are formedonly of a thin membrane of areolar and elastic tissue, lined by a layer ofsquamous epithelium, no longer provided with cilia. At the same time theyare altered in shape; each of the minute terminal branches widening outfunnel-wise, and its walls being pouched out irregularly into small sacculardilatations, called air-cells, figure 223, b. Such a funnel-shaped terminalbranch of the bronchial tube, with its group of pouches or air-cells, has beencalled an wjiindibitlum, figures 223 and 224, and the irregular oblong spacein its center, with which the air-cells communicate, an intercellular passage.
Text Appearing After Image:
Fig. 225.—From a Section of the Lung of a Cat, Stained with Silver Nitrate. A. D, Alveolarduct or intercellular passage; 5, alveolar septa, N, alveoli or air-cells, lined with large flat,nuleated cells, with some smaller polyhedral nucleated cells; At, unstriped muscular fibers. Cir-cular muscular fibers are seen surrounding the interior of the alveolar duct, and at one part is seena group of small polyhedral cells continued from the bronchus. (Klein and Noble Smith J An inflated and dried turtles lung is the homologue of a lobule. Such apreparation can be cut across to illustrate the intercellular passage, the in-fundibulum, and the air-cells. The air-cells, or air-vessels, are sometimes placed singly, like recessesfrom the intercellular passage, but more often they are arranged in groupsor even rows, like minute sacculated tubes, so that a short series of vesiclesall communicating with one another open by a common orifice into the tube.The vesicles are of various forms according t

Note About Images