Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . giving rise to the formation of the blood and the organs of cir-culation ; whence it has been called the blood layer or vascularlayer. § 457. From the manner in which the germ is modified, we can generally distinguish, at a early epoch, to what department of theanimal kingdom an individual is to be-iong. Thus in the articulata, the germis divided into segments, indicating thetransverse divisions of the body, as, forexample, i
Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . giving rise to the formation of the blood and the organs of cir-culation ; whence it has been called the blood layer or vascularlayer. § 457. From the manner in which the germ is modified, we can generally distinguish, at a early epoch, to what department of theanimal kingdom an individual is to be-iong. Thus in the articulata, the germis divided into segments, indicating thetransverse divisions of the body, as, forexample, in the embryo of the crabs(fig. 290). The germ of the verte-brated animals, on the other hand, displays a longitudinal fur-
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Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
