Long bones have several key structures: cartilage supports the ends, epiphyseal plates allow for growth, the epiphysis are the top and bottom sections, the diaphysis is the long shaft, the periosteum is the outer layer, the medullary cavity stores blood cells and fat, compact bone is hard bone, and cancellous bone has a spongy or honeycomb appearance.

1. Lloyd Dean
Structure of Long Bone

2. Structure of Long Bone
 Cartilage – Supports ends of bone
 Epiphyseal Plates – Growth plates
 Epiphysis –Top and bottom sections of long
bone
 Diaphysis – Long shaft of bone
 Periosteum – Outer layer of bone
 Medullary Cavity – Blood cells and fat storage
 Compact Bone – Hard bone
 Cancellous Bone – Spongy bone or honeycomb
appearance