The hydropathic encyclopedia: a system of hydropathy and hygiene .. . uscles are said to be im-pressible to stimuli, and to contract when so impressed, by which mo-tion or action is produced. The term contractility seems to implyimpressibility—the susceptibility to be acted on and the action and excitability are but different names for this susceptibil-ity. Tonicity, by which physiologists mean the ability to maintain per-manently a certain degree of contractility, is certainly nothing but sgreater or less degree of contractile energy. All the actions or motions of the vari
The hydropathic encyclopedia: a system of hydropathy and hygiene .. . uscles are said to be im-pressible to stimuli, and to contract when so impressed, by which mo-tion or action is produced. The term contractility seems to implyimpressibility—the susceptibility to be acted on and the action and excitability are but different names for this susceptibil-ity. Tonicity, by which physiologists mean the ability to maintain per-manently a certain degree of contractility, is certainly nothing but sgreater or less degree of contractile energy. All the actions or motions of the various parts and organs are pro-duced by the contraction or shortening of these muscular fibres, atrather, their alternate contraction and expansion. Muscular contraction is accompanied with the production of sounaand heat; the sound is probnbly owing to the movement of the adja-cent fibres on each other, and the elevation of temperature is doubtlessto be attributed to those chemical changes by which the disintegrationand renewal of the tissue is effected. Fig. MAGNIFIED FRAGMENTS OF MUSCULAR FIBRES. great regularity in the direction of its action. may be separated into fibrillar by the splitting o>f its contents in 9 tongi In Fig. 123 are representt-dfragments of striped element*ary fibres, and showing •cleavage in opposite direc-tions. 1. Longitudinal clear-age. 2. 3, 4. Transversecleavage forming disks. detached disk, showing theprimitive particles, called8arcous 7, 8. Separated fibrillar, showing thebeaded enlargements. An ordinary muscleconsists of bundles offibres, arranged withEach individua fibre THE TIS3CES. 23» tudina direction; ttese fihrillae then present n bai ded appearance,caused by the arrangement of the contents of .he tubB. In structure muscular tissue is divided into striated (striped) andtun-striated (unstriped)—the former being mainly appropriated to thevoluntary functions, and the latter to the organic or involuntary. Func-tiona
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Keywords: ., bookcentury1800, bookdecade1870, bookpub, booksubjecthydrotherapy
