File:Practical physiological chemistry - a book designed for use in courses in practical physiological chemistry in schools of medicine and of science (1907) (14595374628).jpg

Identifier: practicalphysiol1907hawk (find matches)
Title: Practical physiological chemistry : a book designed for use in courses in practical physiological chemistry in schools of medicine and of science
Year: 1907 (1900s)
Authors: Hawk, Philip B. (Philip Bovier), b. 1874
Subjects: Biochemistry
Publisher: Philadelphia : Blakiston
Contributing Library: Columbia University Libraries
Digitizing Sponsor: Open Knowledge Commons

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of the serum of humanblood varies between 1.026 and 1.032. Beside the proteid constituents already mentioned, otherbodies which are found in both the plasma and serum are thefollowing: Sugar (dextrose), fat, enzymes, lecithin, choles-terin and its esters, gases, coloring-matter (lutein or lipo-chrome) and mineral substances. In addition to these bodiesthe following substances have been detected in normal humanblood: Creatin, carbamic acid, hippuric acid, paralactic acid,area and uric acid. Some of the pathological constituents ofblood are, proteoses, leucin, tyrosin and other amino acids,biliary constituents and purin bodies. There has recently been considerable controversy regardingthe form of the erythrocytes or red blood corpuscles of humanblood. It is claimed by some investigators that the cells arebell-shaped or cup-shaped. As the erythrocytes occur nor-mally in the circidation, however, they are probably thin, non-nucleated, biconcave discs. When examined singly, under PLATE IV.
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Nokmal Erythrocytes and Leucocytes. BLOOD. 151 the microscope, they possess a pale greenish-yellow color (seePlate IV, opposite), whereas when grouped in large masses areddish tint is noted. The blood of most mammals contains erythrocytes similarin form to those of human blood. In the blood of a fewmammals, however, such as the llama and camel as well as inthe blood of birds, fishes, amphibians and reptiles the ery-throcytes are ordinarily more or less elliptical, biconvex andpossess a nucleus. The erythrocytes vary in size with thedifferent animals. The average diameter of the erythrocytesof blood from various species is given in the following table :* Elephant 3 fa^ of an inch. Guinea-pig jjij of an inch. Man JT3JJ of an inch. Monkey 7jjt of an inch. Dog ttoVt of an inch. Rat xfan OI an inch. Rabbit jrfo of an inch. Mouse g yVr of an inch. Lion 4ttt of an inch. Ox T$tv °f an inch. Horse TjTT of an inch. Pig Tyjj of an inch. Cat TjVj of an inch. Sheep ■• 4 yV? of an inch. Goat ^

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