Multiple choice

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

  1. in internal surface of fundus of bladder

  2. below the apex of urinary bladder

  3. in the body of bladder

  4. below the neck of bladder
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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.

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