ends_at
part_of
starts_at
urogenital sinus
bladder-urethra transition zone
EMAPA:36332
The bladder-urethra transition zone (syn: bladder-urethra junction) (TS:22-TS:28) is comprised of epithelium and mesenchyme of bladder-urethra transition zone. The zone or region located where the bladder neck meets the urethra/pelvic urethra, marking the junction where these two different epithelia meet (urothelium of bladder and epithelium of pelvic urethra). It is similar to transitional zones in other organs, such as the female cervix and the Z-line in the oesophagus. It is located close to where the nephric duct attaches to the urogenital sinus. Part of the urogenital sinus (to TS:26) and part of the urinary system. Use these terms to annotate expression in the epithelium or mesenchyme where the bladder meets the pelvic urethra, when the tissue cannot be identified as being either part of the bladder or part of the pelvic urethra.
anatomical_structure
bladder-urethra junction
lower urinary tract
TS22
TS28