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Classification of bones
Long bones, short bones, flat bones, irregular bones, suture bones, sesamoid bones.
proximal end of a long bone, which is spongy(cancellous) bone arranged in laticework of thin plates
in growing long bones, a layer of hyaline cartilage that allows the diaphysis to grow in length.
found where two bones come together(joint). Thin layer of hyaline cartilage that coves the epiphyses. Function is to reduce friction at joint and absorb shock.
membrane that lines the medullary cavity of the bone. It contains osteoprogenitor cells and osteoclasts.
Found in inner portion of the periosteum, in the endosteum and canals in bone that contain blood vessels. Function: to undergo mitosis and become osteoblasts.
cells that form bone tissue. They secrete collagen and matrix which calcifies to build bone tissue.
Mature bone cells, the main cells of bone tissue. They maintain bone tissue by exchanging nutrients and wastes with the blood.
osteoblasts are constantly forming new bone tissue, and osteoclasts are constantly destroying old bone tissue
calcium ion level in the blood is strictly regulated, regulated by parathyroid glands and thyroid gland
secretes the hormone calcitonin, increased calcitonin equals decreased blood calcium level
organization of the fracture hematoma into granulation tissue called a procallus
Compact (dense) bone
Consists of osteons with very little space between them
Composes bone tissue of the diaphysis
Function is to protect and support
1. Done NOT contain osteons
2. Consist of trabeculae surrounding many red-marrow filled spaces.
3. Found in short, flat and irregular bones and in the epiphyses of long bones.
Function is to store RED marrow and provide some support
Structure of the epiphyseal plate
1. Zone of resting cartilage
2. Zone of proliferating cartliage
3. Zone of Hypertrophic cartilage
4. Zone of calcified cartilage
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