Sidney Altman (May 7, 1939 -) is a Canadian born molecular biologist, working in the USA at at Yale University. In 1989 he shared the Nobel Prize for Chemistry with Thomas R. Cech for their work on the catalytic properties of RNA.
... anatomy, the urethra is a tube that connects the urinary bladder to the outside of the body. The urethra has an excretory function in both sexes, to pass urine to ...