A system of human anatomy, general and special . TRANSFORMATION OF ANIMAL CELLS. 1. Cells increase in size and change their shape. The cut () gives a good idea of the bizarre and erratic forms which cellsoccasionally assume. 2. Cells undergo an alteration Fig. their substance and the cell-walls may acquirethickness, or the whole cell mayflatten and its parietes coalesce,and thus a simple flat disk be theresult. A cell may also changeits chemical character, an in-stance of which is afforded by A-sthe cells of the cuticle, which,once soluble in acetic acid, be-come insol
A system of human anatomy, general and special . TRANSFORMATION OF ANIMAL CELLS. 1. Cells increase in size and change their shape. The cut () gives a good idea of the bizarre and erratic forms which cellsoccasionally assume. 2. Cells undergo an alteration Fig. their substance and the cell-walls may acquirethickness, or the whole cell mayflatten and its parietes coalesce,and thus a simple flat disk be theresult. A cell may also changeits chemical character, an in-stance of which is afforded by A-sthe cells of the cuticle, which,once soluble in acetic acid, be-come insoluble in the same after acquiring their corneous character. New deposits may also, as has before been stated, occur within thecell, so as almost to obliterate its cavity. 3. Division into fibrils. This occurs in the formation of feathersin birds. A cell elongates and becomes filled with fibres, which onthe sloughing away of the cell-wall remain and form the structureof the feathers.
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Keywords: ., bookcentury1800, bookdecade1840, booksubjectanatomy, bookyear1847
