| 释义 |
mesothelium Embryol. and Histology.|mɛsəʊ-, miːzəʊˈθiːlɪəm|
Pl. -thelia.
[f. meso- + epithelium.]
In a vertebrate embryo, epithelium that forms the surface layer of the mesoderm and lines the body-cavity; in a post-natal organism, the tissue derived from this that forms the lining of the pleuræ, peritoneum, and pericardium (by some writers, esp. pathologists, not regarded as epithelium).
1886C. S. Minot in Buck's Handbk. Med. Sci. III. 176/1 The whole of the mesoderm..does not go through this metamorphosis, but..a part remains closely compacted; but ultimately it is only the single layer of cells immediately bounding the cœlom, and the cells constituting the myotomes.., which remain thus close together. These cells, therefore, have all the characteristics of an epithelium, so that the cœlom is limited by an epithelium of cuboidal cells, for which I have proposed the name mesothelium. Ibid. 176/2 Derivatives of the mesothelium (epithelial mesoderm). 1945W. J. Hamilton et al. Human Embryol. vi. 80 The mesoderm bounding the coelom [of the embryo] will persist throughout life as an epithelium (so-called mesothelium) which forms the visceral and parietal linings of the peritoneal, pleural and pericardial cavities. Parts of the peritoneal mesothelium become specialized to form the germinal epithelium, the paramesonephric ducts..and the cortex of the suprarenal gland. 1950A. W. Ham Histol. xi. 140/1 Endothelium and mesothelium, structurally, are both typically epithelial... Nevertheless, pathologists usually prefer to consider endothelium and mesothelium as apart from ordinary epithelium because endothelial and mesothelial cells behave differently from ordinary epithelial cells. 1960F. D. Allan Essent. Human Embryol. xvii. 165 The cells of the cortical primordium are derived from the coelomic mesothelium. 1968Passmore & Robson Compan. Med. Stud. I. xvii. 3/2 Endothelia and mesothelia arise only from mesoderm.
Hence mesoˈthelial a.
1892C. S. Minot Human Embryol. (1897) vii. 159 Although the pancreas, ovary, and spinal cord all contain connective tissue, we do not call them mesenchymal, but respectively entodermal, mesothelial, and ectodermal. 1946B. M. Patten Human Embryol. xv. 469 In the case of a part of the gut tract which lies within the body cavity, the corresponding connective-tissue layer will be supplemented by an epithelial layer derived from the mesoderm which lines the coelomic cavities... This mesothelial layer provides a smooth, moist surface which permits the viscera within the body cavity to change shape and position with a minimum amount of friction. 1950[see above]. 1968Passmore & Robson Compan. Med. Stud. I. xvi. 5/2 (heading) Mesothelial or serosal sac membranes. |