| A | B |
|---|
| tendon | connects muscle to bone |
| what is a tendon composed of? | parallel bundles of collagen fibers |
| ligament | connects bone to bone |
| what is a ligament composed of? | non-parallel and parallel bundles of collagen fibers |
| what is the composition of the matrix of bone? | collagen and mineral salts |
| collagen | imparts flexibility (1/3)weight of bone matrix |
| mineral salts | imparts hardness (2/3)weight of bone matrix |
| matrix | extracellular fibers and ground substance |
| functions of the skeletal system | protection, support, storage of minerals and lipids, blood cell production, leverage |
| cartilage matrix | protein fibers and ground substance |
| hyaline cartilage(most common)-(location) | ribs, sternum, synovial joints, respritory passageways |
| fibrocartilage(location) | intervertebral disks at pubic symphysis, at knee joint |
| elastic cartilage(location) | external ear and canal, nose tip, epiglottis |
| chondroblast | cartilage forming cells |
| chondrocyte | cartilage maintaining cells |
| osteoblast | bone forming cells |
| osteoclast | bone destroying cells |
| osteocyte | bone maintaining cells |
| 2 types of bone tissue | compact bone, cancellous bone |
| compact bone(functional unit) | osteon--resist stresses along limited range of axes of bone |
| cancellous bone | trabeculae--resist limited stresses from all axes, reduces weight of skeleton w/out compromising strenght |
| 2 types of bone growth | appositional and endochondral |
| appositional | growth increases diameter--starts from surface and goes outward |
| endochondral | growth increases length of bone--occurs at epiphyseal plates |
