BIOB34H3 Lecture Notes - Hyaline Cartilage, Medullary Cavity, Bone Marrow

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20 Mar 2013
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Protection of internal organs: points of muscle attachment, form joints. Mineral storage: mainly calcium and phosphorous. Production of blood cells: red marrow in some bones. Energy storage: yellow marrow is mostly fat, types of bones. Long bones: longer than they are wide (e. g. , most bones of limbs) Short bones: roughly cube shaped (e. g. , bones of wrist and ankle, sesamoid bones- in tendons, provide support (e. g. , patella) Flat bones: flat and curved (e. g. , cranial bones, ribs, sternum, scapula) Irregular bones: complex shapes (e. g. , vertebrae and hip bones, basic structure of a long bone. Diaphysis: long part of bone (shaft) Articular cartilage: hyaline cartilage covering ends of bone, decreases friction and absorbs shock. Medullary cavity: cavity in diaphysis containing yellow marrow. Endosteum: lining of marrow cavities, delicate ct with bone cells, histology. Matrix: 25% water, 25% protein fibers, collagen gives bones flexibility and strength, 50% mineral salts, mainly calcium phosphate and calcium carbonate (hydroxyapatite = mineral salts, gives bone hardness.

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