THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The urinary meatus, also known as the external urethral orifice, is the opening or meatus of the urethra. It is the point where urine exits the urethra in males and in females, and also where semen exits the urethra in males.

Detailed explanation-2: -The male external urethral orifice is the external opening or urinary meatus, normally located at the tip of the glans penis, at its junction with the frenular delta.

Detailed explanation-3: -The meatus is a slitlike orifice with its long axis in a midline sagittal plane. The urethral meatus is slightly ventral to the tip of the penis. The bulbous urethra is invested in the bulb of the penis, the portion of corpus spongiosum that lies between the split corpora cavernosa in the superficial perineal space.

Detailed explanation-4: -During urination and ejaculation it opens up, and its diameter then varies from 0.5 to 0.8 centimetre along its length, but at other times its walls touch and its lining is raised into longitudinal folds.