File:Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct - for the use of schools and colleges (1870) (14780415004).jpg

Identifier: outlinesofcompar00agas (find matches)
Title: Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges
Year: 1870 (1870s)
Authors: Agassiz, Louis, 1807-1873 Gould, Augustus A. (Augustus Addison), 1805-1866 Wright, Thomas, 1809-1884
Subjects: Physiology, Comparative Zoology
Publisher: London : Bell & Daldy
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library

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blood-corpuscles P2 212 OF THE BLOOD AND CIRCULATION. (fig. 229). In these vessels the round lymph-corpusclesf«,0,a,0) are seen swimming under, over, and behind the oval blood-discs (b, b),both of them pro-ceeding paripassuhere, and havingthe same mode-rated motion : stillit is impossible notto observe that theblood-corpusclesare possessed of agreater degree oflubricity, that theyevidently glidemore readily overone another andover the smooth //^V \/l!// ^V/V\C~H55^ walls of the ves- //YV&Lj/y ^ r^S^^J _ Sels, than the lymph-corpuscles,which seem oftento get set fast at the bendings ofFig. 229.—View in outline of a large vein of the ,1 1 1 <- frogs foot magnified GOO times. The blood-glo- Ls £ bules, b and c, present sometimes their thin edges,sometimes their broad surfaces, here they lie pa-rallel, there diagonally, and elsewhere athwart the branches arecourse of the vessel. The lymph-globules, a, a, areprincipally conspicuous in the clear space near thewalls of the vessel.
Text Appearing After Image:
I the angles whereanastomosing re-ceived or given /r .-, .-, °off » tnere, ^ey re-main sticking toran instant, and then are suddenly carried on again. Singleblood-corpuscles, too, may frequently be observed hurledby a wave, as it were, against angles of the containingvessels, and remain hanging for a brief interval; at thesetimes they may be seen quivering or oscillating, in spiteof the pressure they must undergo; but their stoppagesare never long, they soon fly off again, or, becoming in-volved in the general stream, they are borne onwards. IntAniiumplating the circulation under these circumstances, abyeciacle of the most interesting kind is presented to the eye: OF THE BLOOD AND CIBCULATION. 213 the little molecules of the blood are seen in ceaseless motionand alive, but altogether without inherent activity, now borneforward as upon gentle waves, and then pushed more im-petuously along; now advancing in serried ranks, nowthreading their way in single files, the entire phenomena de

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