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PT203 Bone Vocab

PT 203 W2 Bone Vocab

Ossification Conversion of cartilage to bone. Occurs during the second & thirds months of embryonic life
Osteoblasts bone-building cells that become active during the ossification stage
Collagen a fibrous protein, intercellular substance giving the tissue strength & resilience
Osteocytes a star-shaped cell that remain enclosed after the intercellular material has hardened. they are still alive & continue to maintain the existing bone matrix. They do not produce new bone tissue
Osteoclasts large, multi-nucleated cells. responsible for resorption
Hormones regulating bone formation & resorption Vitamin D - promotes Calcium absorption from intestine Calcitonin - produced in the thyroid gland. promotes the uptake of calcium by bone tissue Parathyroid (PTH) - produced in the parathyroid glands. causes bone resorption & release of calcium in blood
Red Marrow found at the ends of the long bones & the center of other bones
Yellow Marrow found mainly in the central cavities of the long bones. composed mostly of fat
Periosteum membrane covering the outside of bones.
Endosteum lining the bone's marrow cavity. contains cells that also aid in the growth & repair of bone tissue
Haversian Canal contains nerves & blood vessels (inside Compact Bone)
Perforating (Volkmann) Canals appear from one side of the bone shaft to the other (In Compact Bone)
What are the 3 primary layers of the skeletal muscles? Endomysium - around each individual muscle fiber Perimysium - around fascicles (bundles) of muscle fibers Epimysium - around entire muscle; forms innermost layer of deep fascia
Diaphysis long, narrow shaft of the long bone
Medullary located in the center of the diaphysis (long, narrow shaft of the long bone) containing bone marrow
Epiphysis Irregular ends of the long bones
Created by: pierce258



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