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(A) A representation of the anatomy of the lower urinary tract including bladder and urethral structures, with inputs from various nervous systems illustrated. (B) A smooth muscle bundle depicting smooth muscle cells in close contact with an ICC-like cell and nerve. Abbreviations: ACh, acetylcholine; NO, nitric oxide; ATP, adenosine 5′-triphosphate; ICC, interstitial cell of Cajal.
