vas rectum

== English == === Etymology === First attested in 1750. From Latin vās (“vessel”) + rēctum (neuter nominative singular of rēctus, “straight”), literally “straight vessel”. === Pronunciation === (Received Pronunciation, UK) enPR: väsʹ rĕkʹtəm, IPA(key): /ˈvɑːs ˈɹɛktəm/ === Noun === vas rectum (plural vasa recta) (anatomy, usually in the plural) One of a number of straight vasa (tubes), specifically: (somewhat dated) A straight seminiferous tubule conveying semen from its pertaining tubulus seminiferus contortus (convoluted seminiferous tubule) to the rete testis of the testicle that contains it; now more commonly called the tubulus seminiferus rectus (straight seminiferous tubule). [1750–] 1750, Albert Haller, “Of the paſſages of the ſemen” in The Philoſophical Tranſactions (1743–1750) Abridged X (1756), ed. John Martyn, page 1,092 A yellowiſh ſemen is generated in the vaſcula ſerpentina, is ſent down into the vasa recta, and thence depoſited in the rete under the albuginea. For more quotations using this term, see Citations:vas rectum. (sometimes more fully, “vas rectum renis”) Any one of many straight capillaries in the kidney that branch off from the arteriolae efferentes (efferent arterioles) of juxtamedullary nephrons, enter the medulla, and surround the loop of Henle, where they function to absorb water and to secrete salt and urea into the renal interstitium, thereby facilitating the production of concentrated urine. [1858–] 1858, Lionel Smith Beale, Illustrations of the Constituents of Urine, Urinary Deposits, and Calculi, Fig. 1. g., page 3 Long and almost straight vessels (vasa recta), into which the efferent vessel of those tufts situated at the bases of the pyramids, divides. Any one of numerous straight arteries that branch off from the arcades of the mesentery of the jejunum and ileum whence they head toward the small intestine. [most recent sense] ==== Hyponyms ==== (renal capillary): arteriola recta renis, venula recta renis ==== Translations ==== === Further reading === Seminiferous tubule on Wikipedia.Wikipedia Vasa recta on Wikipedia.Wikipedia Vasa recta (intestines) on Wikipedia.Wikipedia