Art-Labeling Activity: Anatomy of the urinary tract 18 of 24 Drag the appropriate labels to their respective targets. Rese Ureters External urethral sphincter Urethra Urinary bladder Trigone Rugae Levator ani muscle Internal urethral sphincter Peritoneum Ureteral openings Lumen Mucosa (transitional epithelium) Musculart Adventitia (b) Cross-sectional histology of ureter Lumen Mucosa (transitional epithelium) Detrusor muscle LM Sond (a) Organs of the urinary tract (c) Histology of urinary bladder wall