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Skeletal System
Question | Answer |
---|---|
made of organs called _____ | bones |
number of adult bones | 206 |
number of Infant bones | 350 |
number of bones total | 206 |
Axial skeleton (main_____)consists of:(4) | Main trunkconsists of:SkullVertebrebral columnribs and sternumhyoid bone |
Appendicular skeleton (extremities/______)Cosists of: (2) | (pelvic and shoulder girdles)consists of:1. upper extremities2. lower extremities |
number of Auditory ossicles | 6 |
Functions of Skeletal system(5) | 1.framework-for muscles,fat,and skin2.protection-internal structures3.production-blood cells=henatopoiesis or homopoiesis; RBCs, WBCs, platelets4.storage-calcium, phosphorus and fat5.levers-muscle attatchs to hones to assist in movement |
bones of extremities=_____ | long bones |
diaphysis | long shaft |
epiphysis | ends of bone |
red marrow (found in) (produces) | found in epiphysisproduces RBCs, plt, and some WBCsuse for dx procedures |
Medullarty canal/cavity (inside the _____) (filled with ____) | inside the diaphysisfilled with yellow marrow |
endosteumlines ______ canalkeeps ______ marrow intactProduces some _____ | line the medullary canalkeeps the yellow marrow intactproduces some bone growth |
Red Marrowfound in certian bones (5)function: | found in vertebrae, ribs, sturnum, cranium, proximal ends of humerous and femurfunction: produces RBCs, Thrombocytes, WBCsimportant in manufacture of blood cells and immune system |
Periosteumoutside of ____; tough____necessary for______ and ______contains: ______ | outside or bone; tough membranenecessary for bone growth and repair, nutritioncontains blood vessels |
osteoblasts-cells that _____osteoclasts_cells that _____ | osteoblasts-cells that form new bone tissueosteoclasts-cells that break down bown |
articular cartilage-______"_____ absorber" | Articular cartilage-thin layer that covers the epiphysis"Shock absorber" |
Skull composed of (2) bones | cranial bonesfacial bones |
Cranium-Sheprical ________number of bones: | Cranium-sheprical structure that surrounds and protects the brain;8 bones;1 frontal;2 parietal;2 temporal;1 occipital (back of the head)1 ethmoid (separates nasal cavity from the brain)1 sphenoid |
number of facial bones | 14 total; 1 mandible (lower jaw), 2 maxilla (upper jaw), 2 zygomatic (cheek), 2 lacrimal (inner aspect of eyes), 5 nasal (upper part of nose), 2 palatine (roof of mouth) |
sutures | areas where the cranial bones have joined together |
sinuses | air spaces in the bones of the skull act as resonating chambers for the voice |
foramina | openings in bones that allow nerves and blood vessels to enter or leave the bone |
fontnels | "soft spots" |
spinal column #__ bones | 26 |
functios of vertebrae (2) | protect spinal cord, provide support for head and trunk |