Perineum:

• A. the lymphatic drainage from the scrotum goes to para-aortic nodes
• B. lymphatic drainage from the rectum passes to internal iliac nodes from the upper part and to superficial inguinal group from the lower part
• C. superior rectal branches of the pudendal nerves supply the external and sphincter
• D. the internal anal sphincter is composed of skeletal muscle
• E. the anal canal consists of inner circular muscle fibres and outer longitudinal fibres