BIOL 129 Lecture Notes - Lecture 16: Peritoneum, Inguinal Hernia, Membranous Urethra
Document Summary
Perineum: inferior to pelvic floor, contains external genitalia. Perineal membrane: layer of fascia attached to public arch. Divided into urogenital triangle and posterior anal triangle. Organ that produces gametes (mature sexual reproductive cell) Empty to rete testes and then to efferent ducts and to epididymis. Single tube that is about 18 feet long. Takes two weeks for sperm to travel through. Layers of abdominal wall contribute to layers of spermatic cord and scrotum. Inguinal canal: passage from the abdominal cavity to the scrotum, spermatic cord travels through. Inguinal hernia: protrusion of abdominal peritoneum (often with abdominal contents- intestines) through inguinal canal and into scrotum. Can occur in women but 25x more likely in men. Prostate gland: thin fluid (30& of semen), help prevent urinary tract infections. 3 sections named for their location (1) prostatic urethra (2) membranous urethra (perineal membrane) (3) spongy urethra. Ductus deferens and seminal vesicles empty into ejaculatory ducts which empty into prostatic urethra.
