Human physiology (Volume 2) . DEVELOPMENT OF THE OVUM —CHICK IIS OVO. 465. ?eight inches above the open- Fig- 262. ings of the caeca into the gut. VfffTffti The whole of these changes,which, in the viviparous ani-mal, are effected within thewomb of the mother, takeplace in the incubated chickby virtue of its own powers;and without any assistanceexcept that of the atmosphe-ric air and of a certain degreeof warmth. In the course ofincubation, the yolk becomesconstantly thinner and paler,by the admixture of the white;and, at the same time, innu-merable fringe-like vessels,with flocculent extremit
Human physiology (Volume 2) . DEVELOPMENT OF THE OVUM —CHICK IIS OVO. 465. ?eight inches above the open- Fig- 262. ings of the caeca into the gut. VfffTffti The whole of these changes,which, in the viviparous ani-mal, are effected within thewomb of the mother, takeplace in the incubated chickby virtue of its own powers;and without any assistanceexcept that of the atmosphe-ric air and of a certain degreeof warmth. In the course ofincubation, the yolk becomesconstantly thinner and paler,by the admixture of the white;and, at the same time, innu-merable fringe-like vessels,with flocculent extremities,of a singular structure, form on Embryn ofthe Egg, the inner Surface Of the yolk- Showing the opening in the abdomen, from whichKor, ,^ U„„„ ;^t^ tUn xr^ll,. portionsof the vesicular and areolar membranes andOag, ana nang into llie yOlK. turns of tue intestines are protruding. Magnified The office of these is presumed tvvo ameters- - <*»?E-Home^to be, to absorb the yolk and to convey it into the veins ofthe yolk-bag, where it is assimilated
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectphysiology, bookyear1
