THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -The floor is the skin of the posterior quadrants of the perineum limited by the ischial tuberosities and the coccyx and separated by the anococcygeal raphe. The roof comprises the inferior fascia covering the levator ani muscle.

Detailed explanation-2: -Pudendal canal is an elongated fascial canal located along the lateral wall of ischiorectal fossa. It Is formed by separation of fascia lunata medially from the obturator fascia laterally.

Detailed explanation-3: -Ischiorectal (ischioanal) fossa The former is formed by the obliquely coursing levator ani muscle along with the inferior fascia of the pelvic diaphragm. The latter is formed by two structures: superiorly by the obturator internus muscle and its fascia and inferiorly by the medial part of the ischial tuberosity.

Detailed explanation-4: -The obturator internus muscle is the lateral border of the ischiorectal fossae. The coccygeus muscle also supports and raises the pelvic floor.