| 单词 | islet of langerhans |
| 释义 | > as lemmasislet (or Islet) of Langerhans b. An isolated piece of animal or vegetable tissue. islet (or Islet) of Langerhans [translating French îlot de Langerhans (E. Laguesse 1893, in Compt. rend. hebdom. d. Séances et Mém. de la Soc. de Biol. XLV. 819): named after Paul Langerhans (1847–1888), German anatomist, who, in 1869, first described such islets] , any of numerous highly vascular islets of tissue in the pancreas, composed of light-staining cells of two principal types, one of which secretes insulin and the other glucagon; also elliptical. ΘΚΠ the world > life > biology > substance > [noun] > isolated or differentiated islet1851 island1879 the world > plants > part of plant > cell or aggregate tissue > [noun] > tissue > isolated piece of islet1851 the world > life > the body > secretory organs > gland > specific glands > [noun] > glands having gastric secretions > parts of pancreas islet (or Islet) of Langerhans1896 1851 W. B. Carpenter Man. Physiol. 164 The temporary Cartilages..are equally destitute of vessels when their mass is small; but if their thickness exceed an eighth of an inch, they are permeated by canals for the transmission of vessels. Still these vessels do not ramify with any minuteness in the tissue; and they leave large islets, in which the nutritive process must take place on the plan just described. 1884 F. O. Bower & D. H. Scott tr. H. A. de Bary Compar. Anat. Phanerogams & Ferns 499 Especially in their [the Caryophylleæ] rhizomes, thin-walled, long-celled parenchyma, often forming large irregular islets or annular segments, is inserted between fibrous masses of similar form. 1896 Jrnl. Royal Microsc. Soc. 35 Besides the solid buds which form the first ‘islets of Langerhans’, they give rise to numerous hollow buds. 1897 T. C. Allbutt et al. Syst. Med. III. 955 The ulceration is so extensive that only islets of mucous membrane are left here and there. 1898 T. C. Allbutt et al. Syst. Med. V. 204 Islets of spongy tissue separate the individual nodules [of tubercle]. 1904 Proc. Royal Soc. 73 84 The degeneration or absence of the islets in diabetes. 1910 Practitioner Jan. 32 Many other pathological conditions..have been ascribed to abnormalities of other ductless glands; e.g...glycosuria to the loss of the internal secretion formed by the islets of Langerhans in the pancreas. 1968 Times 27 Nov. 9/3 Those parts of the organ [sc. the pancreas] concerned with carbohydrate metabolism—known as the islets of Langerhans. 1973 Nature 23 Mar. 259 Yields of up to 350 Islets per rat pancreas have been achieved using this method. < as lemmas |
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