Multiple choice

The trigone is highly sensitive triangular structure of the urinary bladder in mammals. It lies _________-.

  1. in internal surface of fundus of bladder

  2. below apex of urinary bladder

  3. in the body of bladder

  4. below neck of bladder

  5. in the fundus of gallbladder

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A Correct answer
Explanation

The fundus of the urinary bladder is the base of the bladder formed by the posterior wall. The smooth muscle of bladder contracts to expel urine from the body. The trigone lies in the internal surface of fundus of bladder.