THE TAENIA OF THE RABBIT COLON, AN ELASTIC VISCERAL MUSCLE
THE TAENIA OF THE RABBIT COLON, AN ELASTIC VISCERAL MUSCLE
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DOI：
10.1007/bf00304599
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发表时间：
1983-01-01
期刊：
影响因子：
--
通讯作者：
GABELLA, G
中科院分区：
文献类型：
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作者：
GABELLA, G
通过相差显微镜和电子显微镜研究了兔近端结肠的纵向肌肉组织（腱）。兔子的大肠杆菌具有几种结构特征，这些特征在该物种或其他物种的其他内脏肌肉中没有发现，并且在某些血管肌肉中很常见。大肠杆菌的特征如下：高度波纹状的肌细胞轮廓（即使肌肉在静止状态下固定）、非常高的表面体积比（1.mu.m2/0.5.mu.m3）、细胞外空间的大百分比体积（约40%）、缺乏肌内隔膜和非常大量的弹性纤维，这些纤维主要在平行于浆膜表面的宽网状结构中纵向延伸。弹性纤维和肌肉细胞膜之间的多个接触点发生在沿着细胞长度的各个层面，通常涉及 11 纳米的微纤维；这些接触以及其他涉及胶原纤维的接触被视为细胞与基质的连接。大肠杆菌实际上没有肌内血管，包括毛细血管。讨论了毛细血管缺乏与弹性材料丰富有关的可能性。
The longitudinal musculature (teniae) of the rabbit proximal colon was studied by phase contrast microscopy and EM. The taenia coli of the rabbit has several structural features which are not found in other visceral muscles of this or other species, and which are common in certain vascular muscles. Among the characteristics of taenia coli are the following: highly corrugated muscle cell profiles (even when the muscle is fixed in a resting condition), very high surface-to-vol ratio (1 .mu.m2/0.5 .mu.m3), large percentage volume of the extracellular space (about 40%), absence of intramuscular septa and very large number of elastic fibers, which run mainly longitudinally in broad meshworks parallel to the serosal surface. Several points of contact between elastic fibers and muscle cell membrane occur at all levels along the length of the cells, often involving 11-nm microfibrils; these contacts, and others involving collagen fibrils, are regarded as cell-to-stroma junctions. The taenia coli is virtually devoid of intramuscular blood vessels, including capillaries. The possibility that the lack of capillaries is related to the abundance of elastic material is discussed.