In medicine, a prosthesis is an artificial extension to the body. Prostheses are typically used to replace parts lost by injury or missing from birth, supplement defective parts, allow transsexuals to change their outward physical gender, and in moviespecial effects.
... of the body. The urethra has an excretory function in both sexes, to pass urine to the outside, and also a reproductive function in the male, as a passage for sperm.
The ...