. Surgical and gynæcological nursing. Every living thing, whether plant oranimal, is composed of cells. The bodies of all the higher animals,man included, are built up out of a vast number of cells of manykinds, and all the activities of their bodies, of growth, of nutritionof secretion, of movement, or of reproduction, are really theactivities of the cells which compose them. CELLS OF BODY AND INVADING CELLS 9 2. Form and Structure of the Cell—Cells exhibit immensevariety in size, in form, in structural complexity, and particularlyin functional activity. A few may be large enough to be visibl
. Surgical and gynæcological nursing. Every living thing, whether plant oranimal, is composed of cells. The bodies of all the higher animals,man included, are built up out of a vast number of cells of manykinds, and all the activities of their bodies, of growth, of nutritionof secretion, of movement, or of reproduction, are really theactivities of the cells which compose them. CELLS OF BODY AND INVADING CELLS 9 2. Form and Structure of the Cell—Cells exhibit immensevariety in size, in form, in structural complexity, and particularlyin functional activity. A few may be large enough to be visibleto the naked eye, but most are far too small to be seen withoutthe aid of magnifying lenses. In its essential features a cell(Fig. 1) consists of a minute globule of matter, the cell body,containing in its centre a smaller body called the nucleus. Amore or less clearly defined membrane, the cell wall, may sur-round the body of the cell. When a cell is stained with anilinedyes the nucleus takes the stain more strongly than the cell. Fig. 1.—Diagram of a cell. body and appears clearly and sharply defined, demonstratingits difference in chemical composition from the remaining cellsubstance. The nucleus is believed to be the most importantelement in the cell structure. It contains a special substance,peculiar to living matter, known as chromatin or chromo-plasm, which appears to play the most important role in thecell activities. The substance of the cell body is called cyto-plasm. It may be smooth or granular in appearance, and some-times has the 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
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectgenitaldiseasesfemal
