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Chapter 6 (6.2 bones are classified according to shape and structure.…

- - - - Tendons and ligaments
    - - Lines the marrow cavity and other inner surfaces.
- - - - Step 2-Bone formation first occurs at the shaft surface. Blood vessels invade the perichondium, and cells of its inner layer differentiate into osteoblasts that begin producing bone matrix.
      - Step 3-Blood vessels invade the inner region of cartilage, and newly differentiated osteoblasts form spongy bone.
      - Step 1- Endochondral ossification starts hrn chondrocytes within cartilage model enlarge and the surrounding matrix begins to calcify. The chondrocytes die because the diffusion of nutrients slows through the calcified matrix.
      - Step 4- as the bone enlarges, osteoclasts break down some of the spongy bone and create bone marrow.
      - Step 5- The centers of the epiphyses begin to cilitify