Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . ELEMENTARY STRUCTURE OF ORGANIZED BODIES. 15. these, cells will by and by be formed, as at c and d, which stillsurround the nucleus intimately, and are very thin in thewalls. These cells expand by growth, and their walls, at thesame time, become thicker. The nuclei also grow in a veryslight degree for a while. Thecells now contain a clear fluid,then a granular precipitate,which generally first forms it-self around the nucleus, as ate, fig
Outlines of comparative physiology touching the structure and development of the races of animals, living and extinct : for the use of schools and colleges . ELEMENTARY STRUCTURE OF ORGANIZED BODIES. 15. these, cells will by and by be formed, as at c and d, which stillsurround the nucleus intimately, and are very thin in thewalls. These cells expand by growth, and their walls, at thesame time, become thicker. The nuclei also grow in a veryslight degree for a while. Thecells now contain a clear fluid,then a granular precipitate,which generally first forms it-self around the nucleus, as ate, figure 4, for example. In theold cells young cells occasion-ally arise. By and by cavitiesor canals are formed in the car-tilages in a way which has notyet been investigated with suffi-cient care, through which thesevessels also take their course. Fig< 4 represents the branchialIf, after this epoch, any new cartilage of a very young larva ofcells are produced, we may pre- the frog. The lower edge of thesume that their evolution takes preparation is the natural limit ofplace, not only from the sur-face of the cartilage, but also around these vascular cavitiesand canals; and, perhaps, it is from th
Size: 1646px × 1518px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectzoology, bookyear1870
