. On the anatomy of vertebrates [electronic resource] . e the contraction, by antagonistic muscles, in the livinganimal. The uncontracted state of mus-cular fibre is sometimes termed relaxa-tion, but is more properly a state ofquiescence or equipollency. Muscles consist of series or bundles ofthe elementary fibres, with their vesselsand nerves, connected together by areolartissue : either in lengthened or flattenedmasses, fixed at the two extremities, called solid muscles; or disposed around cavitiesor canals, and called ( hollow muscles. The non-contractile fibrous parts bywhich the solid mus
. On the anatomy of vertebrates [electronic resource] . e the contraction, by antagonistic muscles, in the livinganimal. The uncontracted state of mus-cular fibre is sometimes termed relaxa-tion, but is more properly a state ofquiescence or equipollency. Muscles consist of series or bundles ofthe elementary fibres, with their vesselsand nerves, connected together by areolartissue : either in lengthened or flattenedmasses, fixed at the two extremities, called solid muscles; or disposed around cavitiesor canals, and called ( hollow muscles. The non-contractile fibrous parts bywhich the solid muscles are attached tothe endo- sclero- and exo-skeletons, arecalled ctendons when long and slender, and6 aponeuroses when broad and flat.§ 46. Myology of Fishes.— The modification of the active organsof motion, and their deviation from the fundamental vertebratetype, proceed concomitantly with the metamorphosis of the passiveorgans, as Vertebrates rise in the scale and gain higher and morevaried endowments: therefore, as the segments of the skeleton. of contraction seen m anelementary fibre of the Skate. Theuppermost state is that previous tothe commencement of contraction. CLXXXV. 131
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