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bio notes 2.5 Skeletal system

bio notes 2.5 Skeletal system - Compound bones has broken...

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Skeletal system Structures and functions: 206 bones in the body Functions: Support, protection, mineral storage, source of blood cells and movement Connective: bone contains a mineral called calcium that provides bone structure. spongy: lots of honeycomb compact: not much space Bone marrow cavity: space in bone that where blood cells are in the body. It makes blood cells. Examples transplants Bone cells: there are osteoblasts (light purple round): which build the bane. Some of them cement themselves inside bone. Osteoclasts: breaks down bone. Osteocytes first osteoblasts -> became osteocytes. They are the bone cells. Bone development cartage found between bones a lot in infants. The cartilage converts to bone called osteofication. Skeletal disorders: most common are fractures/ broken bones Simple: bones has broken but still under skin
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Unformatted text preview: Compound: bones has broken and sticking out Bone repair: bone breaks it has a lot of blood; a blood clot forms to not loose a lot of blood. Next a callus forms: cartilage then becomes spongy loose may take weeks. Then compacts bone Joints: points of attachment between bones. Ex: elbow hinge joint Arthritis: disease of the joints Rheumatoid arthritis: inflation and swelling: fluid at the joints can misshape bones Osteoarthritis: loss of cartilage padding between bones Osteoporosis reduced bone density = less bone. more common in women. Increase in bone depletion and decrease in bone formation Recent Research: bone density can decrease overtime repeated force increase bone density ex: 1. Weight bearing: like running and walking 2. Resistance: tugging muscles the bones causes bone to become denser....
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