The anatomy of the nervous system, from the standpoint of development and function . Fig. 1.—Stages in the differentiation of the neuromuscular mechanism: A to C, Hypotheticearly stages: A, epithelial stage; B, muscle cell at the stage of the sponge; C, partially differen-tiated nerve-cell in proximity to fully differentiated muscle-cell; D, nerve- and muscle-cell ofcoelenterate stage; E, a type of receptor-effector system found in many parts of sea-anemones, in-cluding not only receptors, r, with their nerve-nets, and of muscle cells, m, but also of ganglioncells, g, in the nerve-net; F, sect
The anatomy of the nervous system, from the standpoint of development and function . Fig. 1.—Stages in the differentiation of the neuromuscular mechanism: A to C, Hypotheticearly stages: A, epithelial stage; B, muscle cell at the stage of the sponge; C, partially differen-tiated nerve-cell in proximity to fully differentiated muscle-cell; D, nerve- and muscle-cell ofcoelenterate stage; E, a type of receptor-effector system found in many parts of sea-anemones, in-cluding not only receptors, r, with their nerve-nets, and of muscle cells, m, but also of ganglioncells, g, in the nerve-net; F, section at right angles to the sphincter of the bell of a jellyfish (Rhizos-toma): e, epithelium of the subumbrellar surface; n, nervous layer; m, muscle layer. (Parker.) bring about an internal adjustment of part with part. Here again it acts as asensitive mechanism for receiving stimuli and conducting them to the appro-priate organs of response. These organs through which the nervous systemproduces its effects are known as effectors. While muscles and glands are byfar the most im
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectnervoussystem, bookye
