15 下列何者為尿道外括約肌（external urethral sphincter）所在處？
膀胱頸 膜部尿道 前列腺尿道 陰莖部尿道
ANS B
AT THE BLADDER NECK: IT IS THE INTERNAL URETHRAL SPHINCTER
Showing posts with label URETHRAL. Show all posts
Showing posts with label URETHRAL. Show all posts
Saturday, June 25, 2011
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