Answer to Question 1
These include: an enlarged pelvic outlet, a broader pubic angle, less curvature on the sacrum and coccyx, wider and more circular pelvic inlet, a relatively broad pelvis that does not extend as far superiorly, and ilia that project farther laterally, but do not extend as far superior to the sacrum.
Answer to Question 2
The true pelvis encloses the pelvic cavity and its superior limit is a line that extends from either side of the base of the sacrum, along the arcuate line and pectineal line to the pubic symphysis. The false pelvis consists of the expanded, bladelike portions of each ilium superior to the pelvic brim.