Mole Day is celebrated among chemists on October 23, between 6:02 a.m. and 6:02 p.m. The time and date are derived from Avogadro's number, which is 6.02 × 1023, defining the number of molecules in a mole, a basic chemistry unit.
... function in the male, as a passage for sperm.
The external urethral sphincter is the skeletal muscle that allows voluntary control over urination.
In the human ...