g instrument. The nervous appa-ratus consists of a central ganglion. Fig. 3 (c), con-nected with the periphery by two sets of nerve-filaments. One set is distributed to a part of theintegumentary surface capable of receiving and 84 PHYSICAL EXPRESSION. being acted on by external stimuli (a), the… … Fig. 3.—Nervous system of an Ascidian (Carpenter), a, the moutla; I), the vent;c, the ganglion ; d, the muscular sac. whence an impulse is sent along the efferent fibres,causing contraction of the muscles. Such an actionis termed a reflex action, a term derived from thereflection, as it were, of…
Body language · Physiognomy · Emotions · Kinesics
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