. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. 98 COMPARATIVE ently a clear, homogeneous fluid, really consists of minute grains, or globules, of organic matter floating in water. If the blood of a Frog be poured on a filter of blotting-paper, a trans- parent fluid (caWedjplas- ma) will pass through, leaving red particles, re- sembling sand, on the upper surface. Under the microscope, these particles prove to be cells, or flattened disks (called corpuscles), con- taining a nucleus; some are c
. Comparative zoology, structural and systematic : for use in schools and colleges. Zoology; Anatomy, Comparative; Physiology, Comparative. 98 COMPARATIVE ently a clear, homogeneous fluid, really consists of minute grains, or globules, of organic matter floating in water. If the blood of a Frog be poured on a filter of blotting-paper, a trans- parent fluid (caWedjplas- ma) will pass through, leaving red particles, re- sembling sand, on the upper surface. Under the microscope, these particles prove to be cells, or flattened disks (called corpuscles), con- taining a nucleus; some are colorless, and others red. The red disks have a tendency to run together into piles; the colorless ones remain single. Meanwhile, the plasma separates into two parts by coagulating; that is, minute fibres form, consisting of fibrine, leaving a pale yellowish fluid, called serum™ Had the blood not been filtered, the corpuscles and fibrine would have mingled, forming a jelly-like mass, known as clot. Further, the serum will coagulate if heated, dividing into hardened albumen and a watery fluid, called serosity, which contains the soluble salts of the blood. These several parts may be expressed thus: Fig. 62.—Red Blood-corpnscles of Man: a, shows circular contour; 5, a biconcave section; c, a group in chains. Blood ( Corpuscles ^coJ01^ I- J (.colorless) ( Plasma JfiDime , I serum -j albumen. serosity=water and salts. If now we examine the nutritive fluid of the simplest animals, we find only a watery fluid containing granules. In Radiates and the Worms and Mollusks, there is a sim- ilar fluid, with the addition of a few white corpuscles. But. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Orton, James, 1830-1877; Birge, E. A. (Edward Asahel), 1851-1950. New York : Harper & Bros.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1883
