| 释义 |
‖ vas|væs|
Pl. vasa |ˈveɪsə|.
[L. vās (pl. vāsa), vessel.]
1. a. Anat. A hollow organ serving for the conveyance of a liquid in the body. Commonly in specific applications with Latin epithet, as vas breve (pl. vasa brevia); vas deferens (pl. vasa deferentia) [L. dēferens, pres. pple. of dēferre (see deferent a.1 and n.)], a fibromuscular tube which carries spermatozoa from the epididymis at ejaculation, in man joining the duct from the seminal vesicle at the prostate gland to form the ejaculatory duct. (Also used ellipt. for either of these.)
1578J. Banister Hist. Man vi. 87 (marginal note) Why these ij. are called Vasa deferentia. 1651Biggs New Disp. ⁋174 Exhausting the stock of aliment from the vasa and viscera. 1713W. Cheselden Anat. of Humane Body iv. i. 163 On the upper part of the Testicles, are hard Bodies call'd Epididymi; which are evidently the beginnings of the Vasa Deferentia. 1849–52R. B. Todd Cycl. Anat. & Physiol. IV. 981/1 The vas deferens is round and indurated,—harder than any other excretory duct in the body, by which character it is easily distinguished, when handled, from the other parts constituting the spermatic cord. 1900R. Harrison in Lancet 14 July 96/2, I divided both his vasa in the usual way. Ibid. 97/2 Vasectomy or torsion of the vas for hypertrophy. 1975Nature 9 Oct. 488/1 For collection of spermatozoa, the vasa deferentia were excised aseptically from adult Wistar strain rats.
b. Bot. (See quots.)
Commonly with Latin epithet, as vasa fibrosa, etc.
1843Penny Cycl. XXVI. 148/2 Vasa (vessels),..a term applied to several of the tissues of plants. 1866Treas. Bot. 1205/1 Vasa, the tubes which occur in the interior of plants, and serve for the conveyance of sap or air.
†2. A vase. Obs. rare. (Cf. next.)
1698M. Lister Journ. Paris (1699) 43 Brass Statues and Vasa, and a 100 other things relating to Antiquity. Ibid. 45 Urns and Funeral Vasa of all Materials.
Add:[1.] [a.] vas vasorum (pl. vasa vasorum), any of the very small arteries which supply nutrients to the walls of larger blood-vessels.
1848Dunglison Dict. Med. Sci. (ed. 7), Vasa Vasorum,..small vessels that supply larger. 1902D. J. Cunningham Text-bk. Anat. 737 The walls of the blood-vessels are supplied by numerous small arteries, called vasa vasorum, which are distributed to the outer and middle coats. 1977Lancet 7 May 972/1 The vasa vasorum are probably the richest source of plasminogen activator in the vasculature and may only be stimulated to respond maximally by complete ischæmia. |