Internal trigone of urinary bladder develops from:-: (A) Ectoderm, (B) Endoderm, (C) Mesoderm, (D) Any of above
Answer is C. The entire mucosa of urinary bladder except the internal trigone develops from endoderm of vesicourethal pa of cloaca. The internal trigone is developed from the mesoderm by incorporation of caudal pas of the mesonephric ducts.