The smooth sphincter of the vesical neck, a genital organ.
D001341:Autonomic Nervous System / Q000502:physiology; D004542:Ejaculation; D006801:Humans; D008297:Male; D008875:Middle Aged; D009130:Muscle, Smooth / Q000033:anatomy & histology* / Q000294:innervation / Q000502:physiology; D009132:Muscles / Q000033:anatomy & histology / Q000294:innervation / Q000502:physiology; D011859:Radiography; D013127:Spinal Nerves / Q000502:physiology; D014521:Urethra / Q000033:anatomy & histology / Q000294:innervation / Q000502:physiology; D001743:Urinary Bladder / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000294:innervation / Q000473:pathology / Q000502:physiology; D001745:Urinary Bladder Diseases / Q000473:pathology / Q000503:physiopathology; D014554:Urination; D014566:Urogenital System / Q000033:anatomy & histology*