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Two Divisions of Skeletal System |
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Axial- skull, vertebrae, ribcage Appendicular- limbs, pectoral,pelvic girdles |
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1.Support for the body 2.Protection of soft organs 3.movement 4.hematopoiesis 5.Storage of minerals and fat |
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Two basic types of bone tissue |
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1.Compact Bone 2.Spongy Bone |
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1.Long (mostly compact, arms, legs) 2.Short (mostly spongy, ankles, wrists) 3.Flat (Skull, ribs, sternum) 4.Irregular (Vertebrae and Facial) |
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What minerals make up the matrix of bone? |
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2 Factors that influence bone remodeling |
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Muscle and gravity and blood calcium levels |
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How are blood calcium levels maintained? |
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Definition
IT blood calcium is too low, parathyroid hormone (PTH) stimulates osteoclasts to break bone down. IF it is too high, then calcitonin stimulates osteocytes to deposit more calcium into bones. |
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Fracture repair by a physician |
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Reduction (realignment of bone) Immobilazation (holding bone in place) |
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Four steps of bodily fracture healing |
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Hematoma, Fibrocartilage, fibrocartialige callus, bony callus |
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formation of blood cells (happens in red bone marrow or Hematopoitic tissue) |
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Name of joint that connects skull bones |
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How is a fetal skull different from an adults? |
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Definition
A fetal skull is 1/4 of its body, while an adults is 1/8. Also, a fetal skull is not completely formed, and has fontenels or soft spots. |
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Why are fontenels necessary? |
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Definition
They are needed because they allow for compacting of the skull when passing through the cervix, and to allow for brain growth |
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five regions of vertebrael column |
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cervical thoracic lumbar sacrum coccyx |
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What letter is a normal spinal curvature shaped like |
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Three abnormal spinal curves |
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Scholiosys (off to the side) Kyphosis (bad posture) Lordosis (butt hanging out) |
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