1. Urethra -- MedicineNet
Urethra definition - Medical Dictionary definitions of popular medical terms. Online Medical Dictionary and glossary with medical definitions. online medical dictionary A-Z List. Learn more about our Medical Dictionary and the book.
http://www.medterms.com/script/main/art.asp?articlekey=5907

2. Urethral Syndrome - Disorder Subdivisions -- Information from Healthwise
For additional information and assistance about rare disorders, please contact the National Organization for Rare Disorders at P.O. This is an abstract of a report from the National Organization for Rare Disorders, Inc.
http://www.everettclinic.com/kbase/nord/nord103.htm#nord103-disorder-subdivisio...

3. Urethra -- Information from the Merck Manual
Disorders of Nutrition and Metabolism. Liver and Gallbladder Disorders. The urethra is a tube that drains urine from the bladder out of the body. In males, the urethra is about 8 inches long, ending at the tip of the penis.
http://www.merck.com/mmhe/sec11/ch141/ch141e.html#sec11-ch141-ch141e-21