Textbook of normal histology: including an account of the development of the tissues and of the organs . m ° fibres: around the poles of indicated by transverse lines of cement-sub- the nuclei are aggregations stlllCPof pigment-granules. I he peculiarities ol heart-muscle are—i. The absence of the sarcolemma, the transversely striatedand more faintly longitudinally marked muscular tissue beingnaked. 2. The situation of muscle-nuclei within the sarcous substance,usually near the centre of the cell. 3. The characteristic arrangement of the contractile fibrillae, sincethese are so placed that the
Textbook of normal histology: including an account of the development of the tissues and of the organs . m ° fibres: around the poles of indicated by transverse lines of cement-sub- the nuclei are aggregations stlllCPof pigment-granules. I he peculiarities ol heart-muscle are—i. The absence of the sarcolemma, the transversely striatedand more faintly longitudinally marked muscular tissue beingnaked. 2. The situation of muscle-nuclei within the sarcous substance,usually near the centre of the cell. 3. The characteristic arrangement of the contractile fibrillae, sincethese are so placed that the peripheral fibrillae are grouped into flat,ribbon-like muscle-columns, somewhat radially disposed about thecircumference of the fibre ; the remaining central portion is occupiedby prismatic bundles of fibrillae, together with the nuclei and theassociated protoplasm (Ranvier, Kolliker). The small masses of pro-toplasm which surround the muscle-nuclei usually contain minutefat-drops and pigment-granules. The amount of pigment normallypresent varies with age, increasing from the tenth year (Maass)..
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Keywords: ., bookauthorpiersolgeorgeageorgea, bookcentury1800, bookdecade1890
