. Elements of histology. Histology. 7° Elements of Histology. [Chap. IX. lines. These lines gradually increase in number, and to join that ultimately they form a dense network. Thus a more or less regular pattern of small polygonal fields is produced, which are styled Cohnheim's areas or fields (Fig. 41). Each corre- sponds to the end-view or optical section of a sarcous element prism, and is granu- lar, as if composed of a bundle of minute Fig. 41. — Striped Muscular Fibres in Cross Section. Each fibre is limited by the sarco- lemma; the muscular substance is differentiated into Coh
. Elements of histology. Histology. 7° Elements of Histology. [Chap. IX. lines. These lines gradually increase in number, and to join that ultimately they form a dense network. Thus a more or less regular pattern of small polygonal fields is produced, which are styled Cohnheim's areas or fields (Fig. 41). Each corre- sponds to the end-view or optical section of a sarcous element prism, and is granu- lar, as if composed of a bundle of minute Fig. 41. — Striped Muscular Fibres in Cross Section. Each fibre is limited by the sarco- lemma; the muscular substance is differentiated into Cohnheim's areas. (Atlas.) If this be the case, each sarcous element will have to be considered as a bundle of rods. The bright lines producing the Cohnheim's fields are the interstitial substance. When a muscle fibre shrinks, after death or after some hardening re- agents, Cohnheim's fields shrink into small circular areas, separated by a rela- tively large amount of the interstitial substance. 88. During contraction the cross striation is much narrower, the dim disc becoming shorter in the long diameter of the fibre, but broader in the transverse direction. The broader the lateral disc in a fibre, the more apart from one another are the dim or contractile discs. On the surface of the substance of the muscle fibres, but within the sarcolemma, are seen isolated oblong nuclei, which belong to small protoplasmic, more or less branched corpuscles—the muscle cor- puscles. In the adult fibres these are few and far between; in the young and growing fibres they are numerous and large. Their protoplasm is the sub- stance which, becoming converted into the muscular. 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 Klein, E. (Edward), 1844-1925. Philadelphia : H. C. Lea's Son
Size: 1525px × 1639px
Photo credit: © Paul Fearn / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorkleineed, bookcentury1800, bookdecade1880, bookyear1883
