. The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools . The Cells. — Since the year 1840 it has been known that all plants andanimals are madeup of one or moretiny lumps of mat-ter called cells. Acell, whether ina weed, a worm, Fig. 1. — A cell much enlarged. 1, surface view; O^ man, COnsiStS 2, view of the upper part of 1 cut through the j-nainlv of a Sub-line ae; p, protoplasm; the dark spot is the nucleus and the line around the outside is the stance named pro- ceiiwali. toplasm, which is like the white of a raw egg.
. The human body and health : an elementary text-book of essential anatomy, applied physiology and practical hygiene for schools . The Cells. — Since the year 1840 it has been known that all plants andanimals are madeup of one or moretiny lumps of mat-ter called cells. Acell, whether ina weed, a worm, Fig. 1. — A cell much enlarged. 1, surface view; O^ man, COnsiStS 2, view of the upper part of 1 cut through the j-nainlv of a Sub-line ae; p, protoplasm; the dark spot is the nucleus and the line around the outside is the stance named pro- ceiiwali. toplasm, which is like the white of a raw egg. A minute and usuallyspherical body floatingin the protoplasm is thenucleus. The thin sacordinarily surroundingthe protoplasm is calledthe cell wall. The thinmembrane betw^een thesuccessive layers of anonion is formed by asingle layer of cellsplaced edge to edge. Each effJ? of a toad or Fi^i-^. — Slipper animalcules in a drop of water. Photographed through the micro- f rog when first deposited scope. U
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Keywords: ., bookcentury1900, bookdecade1900, booksubjecthygiene, booksubjectp
