Elementary anatomy and physiology : for colleges, academies, and other schools . elementaryanato00hitc Year: 1869 AND PHYSIOLOGY. 215 just behind the lower jaw. ' These are disposed, in most fishes, in fringed laminae, which are set close together like the barbs of a feather, and are attached on each side of the throat in double rows, to the convex margins of four or five long, bony, or cartilaginous arches, which are suspended from the hyoidean arch.' 487. Air-Bladder.—Another organ which perhaps claims attention here, is the Air-Bladder. This is a small shut sac —sometimes nearly subdivided
Elementary anatomy and physiology : for colleges, academies, and other schools . elementaryanato00hitc Year: 1869 AND PHYSIOLOGY. 215 just behind the lower jaw. ' These are disposed, in most fishes, in fringed laminae, which are set close together like the barbs of a feather, and are attached on each side of the throat in double rows, to the convex margins of four or five long, bony, or cartilaginous arches, which are suspended from the hyoidean arch.' 487. Air-Bladder.—Another organ which perhaps claims attention here, is the Air-Bladder. This is a small shut sac —sometimes nearly subdivided into two or more sections by iTlG. 271. Air-Sac of Fish (Carp), a. &. A Divided Form. c. d. A Tube connecting it with the Esophagus o, a membranous division—which lies near the middle of the back. In most cases it has no connection with any other or- gan, but sometimes has an opening into the esophagus or stomach. The uses for which it has been supposed to exist, are to enable the fish to alter its specific gravity, and also to aid in respiration in some manner. It has also been conjec- tured that it aids the sense of hearing, since it is in direct connection with the auditory apparatus. It is filled with atmospheric air, with greatly varying proportions of oxygen and nitrogen. Some fishes that leave the water occasionally and crawl over the land, have a cavity in the side of the head for water, which is in contact with a respiratory apparatus, and thus the fish can live for some time out of its native ele- ment.—Wyman. 48T. Describe the air-bladder. What docs it sometimes communicate with ? Give its probable uses. What is it filled with ?
Size: 2552px × 784px
Photo credit: © Bookend / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: archive, book, drawing, historical, history, illustration, image, page, picture, print, reference, vintage
