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.
... sphincter is the skeletal muscle that allows voluntary control over urination.
In the human female, the urethra is about 1-1.5 inches (25-38 mm) long and opens in the ...