Centuries: 1st century - 2nd century - 3rd century
Decades: 100s 110s 120s 130s 140s - 150s - 160s 170s 180s 190s 200s
Years: 151 152 153 154 155 - 156 - 157 158 159 160 161
Births
Deaths
... 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 female, ...