Carpenter's principles of human physiology . nchial tube. In consequence of these iiltirnate processes gradually expanding towards their caecal terminations they have been termed infundibula. Both the alveolar passages and the infundibula (air-sacs of Dr. Waters, which he describes rather differently from Schulze as forming a group of from 6 to 10 in number clustered around the extremity of every M, infundibular, alveolar passages. bronchial tube) are beset with numerous small polyhedric cavities with rounded angles and borders termed the alveoli or air-cells (Fig. 163); from ten to twenty of
Carpenter's principles of human physiology . nchial tube. In consequence of these iiltirnate processes gradually expanding towards their caecal terminations they have been termed infundibula. Both the alveolar passages and the infundibula (air-sacs of Dr. Waters, which he describes rather differently from Schulze as forming a group of from 6 to 10 in number clustered around the extremity of every M, infundibular, alveolar passages. bronchial tube) are beset with numerous small polyhedric cavities with rounded angles and borders termed the alveoli or air-cells (Fig. 163); from ten to twenty of each may be counted on the interior of each infundibulum or air-sac. The length of the alveoli of ordinary size are about equal to their breadth; their total number has been estimated approximately at 1700 or 1800 millions, with a surface equivalent to 200 square metres (Ktiss).f The foundation layer of the alveolar wall is composed of a transparent structureless membrane, which in the thickest parts exhibits a distinctly fibrous character,. System of alveolar passages andinfundibula from the margin of theLung of a Monkey (Cercopithecus) in-jected with mercury, magnified 10 dia-meters.—a, terminal bronchial twig; Rindfleisch, Centralblatt, 1872, p. 65. f Physidogie, 1873, p. 338. 346 OF RESPIRATION. Fig. 164.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectphysiology, bookyear1
