Surface Features of Bones. Bone Growth and Repair

Surface Features of Bones. Bone Growth and Repair


Figure 6.3 Endochondral ossification of a long bone. a. A cartilaginous model develops during fetal development. b. A periosteum develops. c. A primary ossification center contains spongy bone surrounded by compact bone. d. The medullary cavity forms in the diaphysis, and secondary ossification centers develop in the epiphyses. e. After birth, growth is still possible as long as cartilage remains at the epiphyseal plates. f. When the bone is fully formed, the remnants of the epiphyseal plates become a thin line. Bone Growth and RepairBones are composed of living tissues, as exemplified by their ability to grow and undergo repair. Several different types of cells are involved in bone growth and repair:      Osteoprogenitor cells are unspecialized cells present in the inner portion of the periosteum, in the endosteum, and in the central canal of compact bone.      Osteoblasts are bone-forming cells derived from osteoprogenitor cells. They are responsible for secreting the matrix…
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