ch.6 Skeletal Sys
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| Skeletal system | made up of bones, cartilage, ligaments and tendons. has blood suppl and uses oxygen
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| Functions of the skeletal system | Support, Protection, Movement, Storage, Blood cell formation
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| Support | Framework supports the soft organs
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| Protection | protects the body parts
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| Movement | site for muscle attachment
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| Storage | 99% Calcum, fat is stored
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| Blood Cell formation | hematopolsis, red, white blood cells , platelets
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| 2 types of bone tissue | compact , spongy (cancellous)
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| 3 types of cells in bone tissue | Osteoblast, Osteoclast, Osteocytes
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| Osteoblast | bone forming cell (makes new bone)
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| Osteoclast | break down (resorb) bone
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| Osteocyte | mature bone cells (stores calcium and phosphate)
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| Compact Bone Tissue | basic functional unit OSTEON (haversian system)
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| Osten | consist of a central canal (osteonic) surrounded by concentric rings (lamellae)
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| Ostenic | central canals of Osten
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| Lamellae | concentric rings
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| spongy bone | is cancellous, light and less dense, consist of plates and bars of bone.
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| trabeculae | plate of bone
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| Femur is an example of | long
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| wrist is an example of | short
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| ribs are an example of | flat
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| osteogenesis | to make bone
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| 2 types of growth in bone development | Intramembranous Ossification and Endochondral Ossification
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| Intramembranous Ossification | cartilage cells cluster together to ake bone, this involves the replacement of sheetlike connective tissue membranes with bony tissue THIS IS HOW FLAT BONES ARE FORMED
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| Endochondral Ossification | involves the replacemnt of hyaline cartilage, this is the way most bones are formed
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| 2 TYPES OF DIVISION OF THE SKELETON | Axial Skeleton, Appendicular Skeleton
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| Axial Skeleton | 80 bones forms rhe vertical axis of the body
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| Appendicular Skeleton | 126 bones includes free appendages, it attaches to the axial skeleton
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| How many bones are in the Axial Skeleton | 28: 8 Cranium, 14 Face, 6 Auditory ossicles
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| sutures | bones in the skull are tightly interlocked by irregular lines
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| sinuses | air-filled cavities that are lined with mucus membranes
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| foramina | opening: in skull bones that allow passage of blood vessels and nerves
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| Articulation | Joints where two bones come together
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| 3 types of articulation | immovable (sutures in the skull) slightly movable (ribs to sternum) freely movable (knee)
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Created by:
AshleyRenay
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