Kirkes' handbook of physiology. / By W. Morrant Baker and Vincent Dormer Harris.
- William Senhouse Kirkes
- Date:
- 1888
Licence: Public Domain Mark
Credit: Kirkes' handbook of physiology. / By W. Morrant Baker and Vincent Dormer Harris. Source: Wellcome Collection.
Provider: This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.
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![CHAP, n.] CELLS AND THEIR NUCLEI. of laminated epithelium, and the simple c^dindrical epithelium of the intestine and many gland ducts. Snch cells may taper off at one or both ends into fine processes, in the former case being caudate, in the latter fusiform (fig. ii). They may be greatly elongated so as to become fibi-es. Ciliated cells (fig. lo, d) must Fig. 10.— Viii-ious forms of cells. <i. Spheroidal, showing nucleus and nucleolus ; b. Poly- hediul; c. Discoidal (blood cells); d. Scaly or squamous (epithelial cells). be noticed as a distinct variety: they possess, but only on their free sui'faces, hair-like processes (cilia). These vary im- mensely in size, and may even exceed in length the cell itself. Finally, Ave have the Orcuiched or stellate cells, of which the largo nerve-cells of the spinal cord, and the connective tissue corj^uscle Fig. II.— Varioita forms of cells, ii.. Cylindrical or columnar ; b. Caudate; c. Fusifonn ; d. Ciliated (from trachea); e. Branched, stellate. are typical examples (fig. ii, e). In these cells the primitive branches by sccondai-y branching may give rise to an intricate network of processes. {b.) According to their situation in the tissues cells are known as epithelial, connective tissue cells, blood cells, glandular, and the like. {<:.) According to tlieir contents, tliey are called fat cells when their protoplasm contains an excess of fat, j)igment cells when it contains pigment; coloured, when their protoplasm is infiltrated • with a colouring matter, as hccmoglobin. c](https://iiif.wellcomecollection.org/image/b24757226_0041.jp2/full/800%2C/0/default.jpg)
