Final Answer:
The hip joint consists of the head of the femur and the acetabulum of the pelvis.
Step-by-step explanation:
The hip joint is a ball-and-socket joint that connects the lower limb to the pelvis. The ball component of the joint is formed by the head of the femur, which fits into the socket-like acetabulum of the pelvis. This articulation allows for a wide range of motion, including flexion, extension, abduction, adduction, and rotation.
The head of the femur is a rounded structure at the proximal end of the thigh bone, and the acetabulum is a concave socket located on the lateral aspect of the pelvic bone. The interaction between these two structures provides stability and mobility to the hip joint, supporting various movements required for activities such as walking, running, and jumping.