ii. Description of the ANS iii. Sympathetic nervous system ... ... middle of paper ... ...nto penile tissue, both directly mediated by parasympathetic afferents. The dilation and relaxation of these areas cause the usually flaccid internal pudendal arteries to fill with blood while venous output is remains constant, resulting in more blood entering the penis than leaves it. This rising pressure causes the penis to enlarge and extend, with the erection maintained by the bulbocavernosus and ischiocavernosus
The lights are dim and the voices quiet. Tension fills the room where Nafisa, a six-year-old Sudanese girl lies on a bed in the corner. Her aunt, 25-year-old Zeinab, watches protectively as her niece undergoes the procedure now known as female genital mutilation (FGM), formerly called female circumcision. In this procedure, performed without anaesthesia, a girl's external sexual organs are partially or totally cut away. Zeinab does not approve. For the past year she has been trying to persuade