The physiology of domestic animals .. by Smith Robert Meade 1854-

Author:Smith, Robert Meade, 1854-
Language: eng
Format: epub, pdf
Tags: Physiology, Comparative, Veterinary physiology
Publisher: Chicago, A. Eger
Published: 1905-03-25T05:00:00+00:00

Fig. 172.— Red Blood-Corpuscles. (Landois.)

A human red blood-corpuscles: 1, seen on the flat; 2, on edge ; 3, rouleaux of colored corpuscles slightly separated. B, colored amphibian blood-corpuscles: 1, seen on the flat, and, 2, on edge. C, ideal transverse section of a human red blood-corpuscle magnified five thousand times linear: ab, diameter;

In the various domestic animals their diameter is placed as follows in fractions of a millimeter : horse, 0.004-0.005 ; ox, 0.003-0.005; dog, 0.005-0.007 ; sheep, 0.002-0.004; goat, 0.002; hog, 0.003-0.004 millimeters. Frequently, particularly in growing animals and after profuse hemorrhage or exhausting disease, red blood-corpuscles smaller than the above will be found. These are probably to be regarded as young, growing blood-cells. The number of the red blood-cells is almost infinite; in one cubic centimeter of blood in man, five million red blood-disks have been estimated to be present; in the goat, nine to ten millions ; in the lamb, thirteen to fourteen millions; in birds, one to four millions; in the fish, one-quarter to two millions ; in the frog, half a million ; and in the pro-teus, thirty-six thousand. In fact, 30 to 40 per cent, of the entire mass of the blood is composed of red blood-corpuscles; thus, in the horse,

BLOOD.

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63. 1 per cent, of the blood is constituted by the plasma, and 30.3 per cent, blood-corpuscles. The red corpuscles, as already mentioned, are heavier than the other constituents of the blood, and are the cause of

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