The mind at work : a handbook of applied psychology / edited by Geoffrey Rhodes.

Date:
1914
Catalogue details

Licence: In copyright

Credit: The mind at work : a handbook of applied psychology / edited by Geoffrey Rhodes. Source: Wellcome Collection.

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    ture and of like functions, that the bodies of all animals and of man are built up. But the myriads of cells of which the body con- sists do not all retain their amceboid structure and functions. The white corpuscles of the blood remain as single cells, capable of movement, sensitive, and reproducing their kind. Other cells, however, become fixed in an altered form, and devoted to special purposes. Thus some become muscle fibres, especially devoted to the function of movement; others deal with the pro- cesses of digestion, preparing and absorbing the food to nourish the rest of the body ; others have lining, supporting, or protecting functions, as in the case of the skin or the bones; while yet another set of cells is concerned pre-eminently with sensation, and the various mental and nervous functions connected therewith. The masses of cells, with their projections and pro- ducts, which become specialized in this way, are termed “ tissues.” Thus there are muscular tissues, nervous tissues, supporting or connective tissues, and glandular tissues. In vertebrate animals the cells and the processes and products of cells which form the nervous system are partly aggre- gated into large masses of nervous material—the brain and the spinal cord—and partly scattered throughout the body as end-organs, the two being connected by fine threads known as nerves,