| 词条 | Prostatic urethra | |||||
| 释义 |
| Name = Prostatic urethra | Latin = pars prostatica urethrae | Image = Gray1142.png | Caption = The male urethra laid open on its anterior (upper) surface. (Prostatic part labeled at upper right.) | Image2 = Illu quiz prostate01.jpg | Caption2 = 1: Vas deferens 2: Seminal vesicle 3: Base of the prostate 4: Apex of the prostate 5: Prostatic urethra | System = }} The prostatic urethra, the widest and most dilatable part of the urethra canal, is about 3 cm long. It runs almost vertically through the prostate from its base to its apex, lying nearer its anterior than its posterior surface; the form of the canal is spindle-shaped, being wider in the middle than at either extremity, and narrowest below, where it joins the membranous portion. A transverse section of the canal as it lies in the prostate is horse-shoe-shaped, with the convexity directed forward. The keyhole sign, in ultrasound, is associated with a dilated bladder and prostatic urethra. Additional imagesReferences{{Gray's}}External links
2 : Prostate|Male urethra |
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