PERINEUM II: ANAL TRIANGLE & UROGENITAL
TRIANGLE
School of Laboratory Medicine and Medical Sciences
ANATOMY
UKZN INSPIRING GREATNESS
, POINTS TO PONDER
• The bony pelvis is made up of which bones?
• What are the difference between a female and male bony
pelvis?
• The perineum is divided into how many triangles? Name the
triangles, boundaries and the structures contained by these
triangles.
• Discuss the different parts which form the external anal
sphincter.
• What forms the ischio-anal fossa?
• Define superficial perineal pouch. What are the primary
structures contained in this pouch and what do these
structures form in females and in males?
• Discuss the 3 pairs of muscles contained in the superficial
perineal ouch.
, PERINEUM...BONY PELVIS…DIFFERENCES
• Bones thinner, smaller, lighter in female
• Inlet heart shaped in male, oval in female - in male, sacral promontory juts into lesser
pelvis
• Outlet larger in female > male
• Pelvic cavity wider/shallower in female
FEMALE MALE
TRIANGLE
School of Laboratory Medicine and Medical Sciences
ANATOMY
UKZN INSPIRING GREATNESS
, POINTS TO PONDER
• The bony pelvis is made up of which bones?
• What are the difference between a female and male bony
pelvis?
• The perineum is divided into how many triangles? Name the
triangles, boundaries and the structures contained by these
triangles.
• Discuss the different parts which form the external anal
sphincter.
• What forms the ischio-anal fossa?
• Define superficial perineal pouch. What are the primary
structures contained in this pouch and what do these
structures form in females and in males?
• Discuss the 3 pairs of muscles contained in the superficial
perineal ouch.
, PERINEUM...BONY PELVIS…DIFFERENCES
• Bones thinner, smaller, lighter in female
• Inlet heart shaped in male, oval in female - in male, sacral promontory juts into lesser
pelvis
• Outlet larger in female > male
• Pelvic cavity wider/shallower in female
FEMALE MALE
