To help compare sizes of different surface areas, here is a list of areas of the order of 1017 square metres, i.e. between 100 billion km2 and 1 trillion km2. See alsoareas of other orders of magnitude.
... at the end of the penis.
Medical problems of the urethra:
Hypospadias[?] is a form of abnormal development of the urethra in the male, where the opening is no ...