Fig. 1. Urogenital tissue formation in mice. (A-F) Histogenesis of
the developing cloaca, GT, UP and bladder at E10.5 (A,D), E11.5 (B,E), E13.5
(C,F). H&E stained mid-sagittal sections of the cloaca, GT and bladder
primordia are shown in D-F. b, bladder; bw, body wall; c, cloaca; gt, genital
tubercle; pcm, peri-cloacal mesenchyme; t, tail bud; u, internal urethra; uc,
umbilical cord; up, urethral plate.