File:Hand-book of physiology (1892) (14762822704).jpg

Identifier: handbookofphysio00bake (find matches)
Title: Hand-book of physiology
Year: 1892 (1890s)
Authors: Baker, W. Morrant, (William Morrant), 1839-1896 Harris, Vincent Dormer Kirkes, William Senhouse, 1823-1864. Hand-book of physiology. 13th ed
Subjects: Physiology Human physiology
Publisher: London : John Murray
Contributing Library: Francis A. Countway Library of Medicine
Digitizing Sponsor: Open Knowledge Commons and Harvard Medical School

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Fig. 119.—Corpuscles of the frog. Thecentral mass consists of nucleatedcoloured corpuscles. The other cor-puscles are tvo varieties of thecolourless form. ch. v.) ACTION OF KEAGENTS ON BLOOD COKPUSCLES. 141 red blood-cells change from a discoidal to a spheroidal form, and dis-charge their cell - contents, becoming quite transparent and all butinvisible. ii. Saline solution produces no appreciable effect on the 0 rift red blood-cells of the frog. Jn the red blood-cells of man j£J j£ the discoid shape is exchanged for a spherical one, with ^ spinous projections, like a horse-chestnut (fig. 120). Their ..11. 1 . • -i-ii? ■ J- Tig.120.—Effect original forms can be at once restored by the use of car- °f saline so- bonic acid. lution.
Text Appearing After Image:
Fig. 121.—The above illustration is somewhat altered from a drawing by Gulliver, in theProceed. Zool. Society, and exhibits the typical characters of the red blood-cells in themain divisions of the Vertebrata. The fractions are those of an inch, and representthe average diameter. In the case of the oval cells, only the long diameter is heregiven It is remarkable, that although the size of the red blood-cells varies so muchin the different classes of the vertebrate kingdom, that of the white corpuscles remainscomparatively uniform, and thus they are, in some animals, much greater, in othersmuch less than the red corpuscles existing side by side with them. iii. Acetic acid (dilute) causes the nucleus of the red blood-cells inthe frog to become more clearly defined ; if the action is prolonged, thenucleus becomes strongly granulated, and all the colouring matter seems tobe concentrated in it, the surrounding cell-substance and outline of the

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