Anatomy All are true about the trigone on the base of the urinary bladder, except: A Mucosa is loosely associated to the underlying musculature B Mucosa is smooth C It is lined by transitional epithelium D It is derived from the absorbed pa of the mesonephric duct 💡 Explanation All are true about the trigone on the base of the urinary bladder, except: ✓ Correct Answer: A. Mucosa is loosely associated to the underlying musculature