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It is the sacrum.
The inferior end would refer to the top of the sacrum because inferior means situated above. ===== Actually, inferior would be the bottom end. Superior is the to end.
The sacrum articulates with the hip bones of the pelvis.
It articulates with each vertebra. Plus the occipital bone of the skull and the 12 pairs of ribs.
the femurs and the sacrum
sacrum
Sacrum
acetabulum of coaxal bone
The talus is the most superior of the tarsals. It forms a joint with the distal end of the tibia.
The spine (specifically L5, the 5th lumbar vertebra). The pelvis also attaches to the sacrum but I think that joint is fused.
The vertebral column articulates at the superior end with the skull, inferior portion with the pelvic girdle, & the ribs laterally.
The manubrium is the superior portion of the sternum and what articulates with the clavicles.