Skeleton Model Research Paper

558 Words 3 Pages
Briefly identify and discuss bones of the pectoral and pelvic girdles as well as their attached limbs associated with skeleton models found in your text.
The pectoral griddle contains: 2 clavicle bones (known as collarbones that brace the scapula and arms making up the shoulder); and 2 scapula bones (known as the shoulder blades functioning as a stabilizer and provides movement of the shoulder). The attachments of the upper extremity from the pectoral area includes: 2 humerus (these are the largest and longest bones in the upper extremity articulating with the scapula, ulna, and radius); 2 radius (one of the 2 bones that forms the forearm); 2 ulnas (the second bone that makes up the forearm, on the proximal end looking resembling a monkey wrench
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They promote movement all having a synovial capsule that has a collagenous structure surrounding the joint, a synovial membrane that is in the inner layer of the capsule secretes synovial fluid and hyaline cartilage acting as pads on the ends of the articulating bones. There are 6 types of synovial joints this includes: hinge (i.e. the elbow and knee), pivot (i.e. between the first and second cervical vertebrae), ball and socket (i.e. shoulder and hip), saddle (i.e. between the first metacarpal and trapezium bone), Condyloid (i.e. the wrist connecting the radius and carpal bones), and gliding (i.e. between the carpals of the wrist). Their function and movement categorize the type of joints they are. Classification of joints includes 3 types: synarthrosis (allows no movement i.e. the sutures of the skull and the gomphoses which connect the teeth to the skull); amphiarthrosis (allows little movement at the joint i.e. the intervertebral disk of the spine); and diarthrosis (a freely movable joint i.e. knee, elbow, wrist, and shoulder). Joints may also be classified structurally based on the components in the joint these may include: fibrous joints consisting of tough collagen fibers; cartilaginous joints made up of a band of cartilage binding bones (i.e. joint between the ribs and costal cartilage); and synovial joint (synovial membrane lining the capsule produces fluid lubricating the joint and decreasing friction) (BBC,

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