The true pelvis and the false pelvis are two distinct areas of the pelvis that serve different anatomical functions and contain different structures.
True Pelvis: The true pelvis is located below the pelvic brim and is a shallow, funnel-shaped cavity. It houses important structures such as the pelvic organs, including the bladder, rectum, and, in females, the uterus and ovaries. The true pelvis is critical during childbirth, as it is the passage through which the baby must move during delivery. The dimensions and shape of the true pelvis are also significant in determining the feasibility of vaginal delivery.
False Pelvis: In contrast, the false pelvis is situated above the pelvic brim and is a broader, more spacious area. It forms part of the abdominal cavity and serves primarily as a support structure for the intestines. Unlike the true pelvis, the false pelvis does not play a direct role in childbirth, though it does provide important support for the organs in the abdominal cavity.
In summary, while both the true and false pelvis are integral parts of the pelvic region, they have different locations and functions. The true pelvis is essential for reproductive tasks and containing pelvic organs, whereas the false pelvis primarily supports abdominal organs.