| 词条 | Primary urethral groove |
| 释义 |
| Name = Primary urethral groove | Latin = sulcus urethralis primarius | Image = | Caption = | Image2 = | Caption2 = | System = | CarnegieStage = | Days = | Precursor = urogenital folds | GivesRiseTo = urethra }} The primary urethral groove or urethral groove is a temporary linear indentation on the underside (ventral side) of the male penis during embryonic development. In humans, it typically appears around 8 weeks of gestation and becomes closed into a normal male urethra by the 12th week. Clinical significanceFailure of complete closure can be associated with hypospadias.[1] References1. ^{{cite journal |vauthors=Holland AJ, Smith GH |title=Effect of the depth and width of the urethral plate on tubularized incised plate urethroplasty |journal=J. Urol. |volume=164 |issue=2 |pages=489–91 |date=August 2000 |pmid=10893631 |doi= 10.1016/S0022-5347(05)67408-3|url=http://linkinghub.elsevier.com/retrieve/pii/S0022-5347(05)67408-3}} {{Development of the urinary system}}{{Authority control}}{{DEFAULTSORT:Urethral Groove}} 2 : Embryology of urogenital system|Human penis |
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