The shape and cross-sectional area of the distal urethra critically affects urinary flow.
D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D014521:Urethra / Q000033:anatomy & histology / Q000502:physiology*; D014554:Urination