Which anatomical feature is a bony ridge on the inner surface of the ilium and pubic bones that divides the true and false pelvis?

Which anatomical feature is a bony ridge on the inner surface of the ilium and pubic bones that divides the true and false pelvis?

• A. Iliopectineal line
• B. Pelvic brim
• C. Sacral promontory
• D. Linea terminalis

Answer: (A)

The dividing boundary between the true and false pelvis is marked by a specific bony ridge on the inner surface of the pelvis. That ridge, called the iliopectineal line, runs from the ilium to the pubis and forms part of the pelvic inlet. Because the false pelvis lies above this boundary and the true pelvis lies below, the iliopectineal line serves as the landmark that separates the two spaces. This makes it the best choice for identifying where the true pelvis begins.

The dividing boundary between the true and false pelvis is marked by a specific bony ridge on the inner surface of the pelvis. That ridge, called the iliopectineal line, runs from the ilium to the pubis and forms part of the pelvic inlet. Because the false pelvis lies above this boundary and the true pelvis lies below, the iliopectineal line serves as the landmark that separates the two spaces. This makes it the best choice for identifying where the true pelvis begins.