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Skeletal System

basic structures and functions

Functions of the skeletal system support, protection, movement, storage of minerals, production of blood cells, storage of chemical energy
How many bones are typically in the head? 22
How many bones are in the spine? Describe the types. 33: 7 cervix, 12 thorax, 5 lumbar, 5 sacral, and 4 coccyx
How many pairs of ribs are on the thorax? How many pairs of each type? 12 pairs: 7 pairs of true ribs, 3 pairs of false ribs, 2 pairs of floating ribs
True ribs joined directly to the sternum
False ribs joined to the sternum by cartilage
Floating ribs not connected to the sternum
What does the shoulder girdle consist of? the scapula and the clavicle
Long bones greater length than width examples: femur tibia, fibula, humerus, ulna and radius
Short bones cube-shaped, equal length and width examples: ankle and wrist bones
Flat bones thin shape/structure examples: cranial bones, sternum and ribs, and the scapulae
Irregular bones examples: vertebrae some facial bones
Sesamoid bones example: patella
Compact tissue forms on outer shell of bones, consists of very hard mass of bony tissue arranged in concentric layers
Cancellous tissue (spongy) located beneath the compact bone, mesh-work of bony bars with many interconnecting spaces containing bone marrow
Articular Cartilage reduces friction and absorbs shock at freely movable joints
endosteum membrane that line the cavity of bones
periosteum tough fiberous membrane that surrounds the outside of bones wherever they are not covered by articular cartilage
medullary cavity contains fatty yellow bone marrow
Created by: malloryfletcher