. Elementary text-book of zoology. Zoology. FIG. 35.—a, smooth muscle fibres isolated. I, piece of an artery (after Frey) ; 1, outer connective tissue layer; 2, the middle layer formed of smooth muscle fibres; 3, non-nu- cleated inner layer. Cf. - warn iraiHumiiamra HUB',, .' ,• .. ! —a, Primitive fibre. i,cross-striped muscle fibre (primitive muscle bundle) of Lacert;i with nerve termination. striped substance, consisting of special doubly refracting elements (sarcous elements) connected to- gether by a simply refracting inter- mediate substance (fig. 36, a, b~). Physiologically, this
. Elementary text-book of zoology. Zoology. FIG. 35.—a, smooth muscle fibres isolated. I, piece of an artery (after Frey) ; 1, outer connective tissue layer; 2, the middle layer formed of smooth muscle fibres; 3, non-nu- cleated inner layer. Cf. - warn iraiHumiiamra HUB',, .' ,• .. ! —a, Primitive fibre. i,cross-striped muscle fibre (primitive muscle bundle) of Lacert;i with nerve termination. striped substance, consisting of special doubly refracting elements (sarcous elements) connected to- gether by a simply refracting inter- mediate substance (fig. 36, a, b~). Physiologically, this form of mus- cular tissue is characterised by the energetic and considerable contraction which immediately follows its excitation, a property which renders it especially suitable for the carrying out of powerful movements (muscles of vertebrate skeleton). In the simplest cases the cross-striped fibrilhe are produced by the deeper parts of the myoblasts, which form a continuous flat surface epithelium (muscle epithelium) above the layer of delicate fibres (Medusa? and Siphonophora) (fig. 34 b). In the higher animals they. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Claus, Carl, 1835-1899; Sedgwick, Adam, 1854-1913; Sinclair, F. G. (Frederick Granville), b. 1858. New York : Macmillan
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectzoology, bookyear1884
