. Surgical and gynæcological nursing. he suggestion of an intracellular network. The con-sistence of the cell substance is probably that of a semifluid orthin jelly. The solid part of plants and animal bodies are notgenerally regarded as part of the living cell substance, but asinert material built up by the chemical activities of the cells, particularly among the single-celled organisms, have 10 INFECTION special structural appendages to facilitate their motion or forother uses. 3. The Activities of the Cell: (1) Movement.—Many cellshave the power of motion by virtue of a contractio
. Surgical and gynæcological nursing. he suggestion of an intracellular network. The con-sistence of the cell substance is probably that of a semifluid orthin jelly. The solid part of plants and animal bodies are notgenerally regarded as part of the living cell substance, but asinert material built up by the chemical activities of the cells, particularly among the single-celled organisms, have 10 INFECTION special structural appendages to facilitate their motion or forother uses. 3. The Activities of the Cell: (1) Movement.—Many cellshave the power of motion by virtue of a contraction of a portionof the cell substance in various ways. The movements of single-celled organisms and the muscular movements of the higheranimals are alike due to the exercise of this power. (2) Reproduction.—At some period in its life every cell hasthe power of reproduction by dividing itself, usually into twodaughter cells (Fig. 2), sometimes into many new cells. Overthis process the nucleus presides through a series of wonderfully. Fig. 2. — Multiplication by simple division in Entamceba coli (Craig). This is a single-celleJ organism which is the cause of certain forms of tropical dysentery in man. complex changes. Every existing cell has arisen from anothercell through the exercise of this reproductive power. Each cellreproduces only its own kind. (3) Chemical Activities.—All cell activities are doubtlesschemical in nature, but the mature cell does a vast amount ofwork in changing the chemical composition of substances takeninto its own body and of the material surrounding it. Thesechemical activities appear in: (a) the absorption of suitablematerial from their surroundings to be utilized in their nutritionand growth; (b) in oxidation, or the burning up of material withthe production of heat; (c) secretion, or the formation of newchemical compounds which are then extruded from the cell;(d) excretion, the casting off of waste material; and (e) what isperhaps akin to sec
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgenitaldiseasesfemal
