VITAL PROPERTIES OF THE BODY
Bodies begin their growth with a simple cell, which is a delicate little bladder or shut sac. Cells take their rise in that portion of the blood which is capable of being organized, and which is called blastema.
animal bodies each cell generally begins as a minute point in the
blastema, and grows until a transparent bladder or vesicle springs out
from one side of it, and soon appears to enclose it. The bladder is then
called the cell, and the point or dot is its nucleus. Within this
nucleus appears another dot, which is called the nueleolus. When fully
ripened, the cell bursts and sets the nucleus free, and this, in its
turn, matures and yields up its contents. Thus all cells have their
origin in germs produced by previously existing parent~ cells. They are
multiplied with great rapidity. Having grown to a certain extent, they
lose their fluid contents, and their walls collapsing or coming
together, they form simple membraneous discs. In this way, with some
variations, the simple tissues of the body begin to be, and the
foundation is laid for the noble structure of man.
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