蚯蚓（正蚓）表皮的精细结构分析
A fine structural analysis of the epidermis of the earthworm, Lumbricus terrestris L.
作者信息
Coggeshall R E
出版信息
J Cell Biol. 1966 Jan;28(1):95-108. doi: 10.1083/jcb.28.1.95.
Abstract
A fine structural analysis of the cuticle, epidermal epithelium, and underlying fibrous tissue of the earthworm is presented. The extreme scarcity or absence of fibroblasts in this animal is pointed out. This finding is further evidence for the epithelial origin of the cuticular fibers, and suggests that at least some of the collagenous connective tissue fibers in the interior of this animal are epithelial in origin. The junctional specializations that unite epithelial cells in the epidermis and intestine are described. Of special interest is the fact that the septate desmosome rather than the tight junction is found in these epithelia. It is shown that the septa are not extensions of the plasma membrane across the intercellular gap. Finally, the nature of the small ellipsoidal bodies that are embedded in the outer layer of the cuticle is discussed.
摘要
本文对蚯蚓的角质层、表皮上皮及下方的纤维组织进行了精细结构分析。指出了该动物中纤维母细胞极度稀少或不存在的情况。这一发现进一步证明了角质层纤维的上皮起源，并表明该动物体内至少某些胶原结缔组织纤维起源于上皮。描述了表皮和肠道中连接上皮细胞的连接特化。特别值得关注的是，在这些上皮中发现的是分隔连接而非紧密连接。研究表明，隔膜并非质膜穿过细胞间隙的延伸。最后，讨论了嵌入角质层外层的小椭圆形体的性质。
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