divisons of the skeleton
|axial||consists of the skull, throx & vertabrae column|
|appendicular||consists of the upper & lower extremities &the shoulder &peliv girdles|
|The vertebral column||(5 regions) 26bones in 5 sections|
|1.cervical(neck)|| 7 vertebrae c1-c7|
-bear the least amount of weight
|2.thoracic (thorax) (with ribs)|| 12 vertebrae T1-T12|
-LEASTmobility done to anticulation (joints). with the ribs &overlapping spinous process.
|3.lumbar(lower back)|| 5 vertebrae L1-L5|
-largest vertebrae-bear the most weight.
|4.sacrum(one bone)||1 bone formed by the fusion of 5 vertebrae approxmily about the age of 18.|
|5.coccyx|| 1 bone formed by the fusion of 3-4 vertebrae|
does not do anything
|the vertebral column. Curves of the vertebrae column|| 1.prosterior/primarycurves|
-develop in uters
allow the fetus to curl up your born with the curves
|2nd curve of the vetebrae column|| 2.Anterior/secondary/curves after your born|
-developes when the baby lifts his head & stand up.
|the skeletal systems||206 bones & ugametus&joints|
|long bone||for movement/designed for locomotion movements found in extremities(arms,legs,fingers|
|short bone|| carpals&tarsels(hands&feet)|
designed to enhance agility.
|flat bones||designed for protection Ex:cranium,sternum,ribs,scapula|
|irregular||have increased surface area for muscle|
| os conxae- (bones pelivic)|
|have increased surface area for muscle and ligament attachment.|