Which structure connects the lower extremities to the axial skeleton?

The pelvis is the structure that connects the lower extremities to the axial skeleton. It serves as the anchor point for the legs, providing support and stability during movement. The pelvis consists of several bones, including the ilium, ischium, and pubis, which together form a strong foundation for the lower limbs. This connection is essential for facilitating various activities such as walking, running, and jumping, as it allows for the transfer of weight and movement between the upper body and the legs.

The spine primarily serves as the central support of the body, but it does not directly connect the lower extremities. The sacrum, while part of the pelvis, primarily functions to connect the spine and pelvis, not the legs specifically. The coccyx, or tailbone, is a small structure at the bottom of the spine and does not play a role in connecting the lower extremities to the axial skeleton. Thus, the pelvis is key in linking the legs to the rest of the body.