| 释义 |
angioblast, n. Physiol.|ˈændʒɪəʊblɑːst, -blæst|
[f. angio- + -blast.]
A primitive cell or body of tissue from which the endothelial cells of blood vessels develop.
1893Funk's Stand. Dict., Angioblast,..one of the cells of the vascular area of the embryo concerned in the formation of blood-vessels. 1901Jrnl. R. Microsc. Soc. 256 The extra-embryonic mesenchyme, the angioblast, or rudiment from which the blood-vessels arise. 1912C. S. Minot in Keibel & Mall Man. Human Embryol. I. xviii. 499 The angioblast..is the first tissue of the embryo to exhibit an unquestionable differentiation and sharp limitation. 1932M. T. Harman Textbk. Embryol. xviii. 314 The germ layer or germ layers from which the blood and the blood system arise has been variously given. By some authors it has been assigned to a definite germ layer of its own, the angioblast. 1966McGraw-Hill Encycl. Sci. & Technol. II. 483/2 The mesenchymal cells with potency to form endothelium are designated as angioblasts. 1988K. L. Moore Essent. Human Embryol. iii. 24 Mesenchymal cells, known as angioblasts, aggregate to form isolated masses and cords known as blood islands.
Hence angioˈblastic a.
1909in Cent. Dict. Suppl. 1915A. M. Paterson Man. Embryol. ii. iv. 229 Probably the angioblastic capillaries grow into the body of the embryo and give rise to the main portions of the vascular system. 1966Acta Radiologica: Diagnosis V. 554 As is well known the angioblastic meningiomas have a bad prognosis compared to ordinary meningiomas. |