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Skeletal System

Vocabulary

TermDefinition
skeletal system the framework of your body
periosteum a tough tight-fitting membrane covering a living bone's surface
cartilage a thick, smooth, flexible tissue layer that covers the ends of bones *acts like a shock-absorber which reduces friction when bones rub together
joint any place where two or more bones come together
ligament tough bands of tissue that hold bones in place at a joint
immovable joint allows little or no movement ex. skull, pelvis
movable joint allows body to make a wide range of motions There are several types including: pivot, ball and socket, hinge and gliding
arthritis common joint problem- symptoms are pain, stiffness and swelling of the joints
spongy bone lightweight bones located toward the ends of long bones ex. thigh and upper arm
compact bone hard, strong layer which contains deposits of calcium phosphate that gives the bone strength
osteoporosis weakness of the bones
fracture broken or cracked bone
marrow red blood cells are formed in the marrow in the center of your bones
appendicular skeleton includes the bones of the appendages (arms and legs) and supports them
axial skeleton includes the skull and the bones that support it such as the vertebrae, ribs and sternum
pivot joint one bone rotates side to side ex. turning your head
hinge joint back and forth movement like hinges on a door ex. elbows, knees and fingers
ball and socket joint the rounded end of one bone fits into a cup-like cavity on another bone ex. arms and legs
gliding joint one part of a bone slides over another bone ex. wrists, ankles, between vertebrae
Created by: cneeson
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