. A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology. Human blood-cells magnified 500 diam-eters. Describe the perfect blood disc or cell. Under what circumstancesmay the elasticity of its sac be shown ? How can blood discs passthrough pores smaller than themselves ? FORMS OF BLOOD-CELLS. 97 cells. Their form iscircular: they havea central depres-sion, but no nu-cleus. Fig. 32 repre-sents the ellipticnucleated blood-cells of the frog,with here and there,at a ,«, chyle cor-puscles. Fig. 33represents the en-dosmot
. A text-book on physiology : for the use of schools and colleges : being an abridgment of the author's larger work on human physiology. Human blood-cells magnified 500 diam-eters. Describe the perfect blood disc or cell. Under what circumstancesmay the elasticity of its sac be shown ? How can blood discs passthrough pores smaller than themselves ? FORMS OF BLOOD-CELLS. 97 cells. Their form iscircular: they havea central depres-sion, but no nu-cleus. Fig. 32 repre-sents the ellipticnucleated blood-cells of the frog,with here and there,at a ,«, chyle cor-puscles. Fig. 33represents the en-dosmotic action ofwater on these 34 (page 98),the action of aceticacid in darkening Fig. Elliptic blood-cells of frog magnified 250 diame-ters. In Fig. 35 (page 98) we Fig. 33. or concentrating the nucleushave an illustrationof the size and ap-pearance of theblood-cell in a rep-tile, the photographfrom which this fig-ure was taken hav-ing been made un-der the same mag-nifying power asthat employed inobtaining the pho-tograph of humanblood. The cell wall of theblood-cells is gener-ally admitted to befibrin, or some sub-stance allied thereto; but there has been much differ-ence of opinion respecting the constitution of the nu-cleus of those cells which possess it. By some, this alsohas been regarded as fibrin; by others, as fat; and by
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Keywords: ., bookautho, bookcentury1800, bookdecade1860, booksubjectphysiology
