Term | Definition |
bone marrow | a jelly-like substance inside some bones that produces blood cells |
ligaments | bands of non-stretchy connective tissue that connect bone to bone |
cartilage | soft substance that acts as cushion between some bones. your nose and ears are also made of this |
tendons | connective tissue that attaches muscles to bones |
voluntary | to do something by choice |
involuntary | something you cannot control (happens automatically) |
hinge joint | allows movement in one direction, like knees and elbows |
ball-and-socket joint | joint that allows the most freedom of movement, like in hips and shoulders |
pivot joint | allow a rotating or twisting motion, like in the neck |
gliding joint | allow a sliding (back and forth) motion, like in wrists and ankles |
periosteum | the tough, tight-fitting outer membrane that covers bone |
compact bone | the layer of bone that is strong, dense and tough |
spongy bone | the inner layer of bone, which is lighter and softer |
movable | a type of joint where there can be motion in various directions, such as an elbow or shoulder or wrist |
immovable | a spot where 2 bones meet but no motion is allowed, such as in the skull |
clavicle | also known as the collarbone |
humerus | also known as the upper arm bone |
vertebra | also known as the spine |
femur | also known as the thigh bone or upper leg bone |
patella | also known as the kneecap |
tibia | also known as the shin bone |
craniuml | also known as the skul |
scapula | also known as the shoulder blade |
flex | to bend |
extend | to lengthen |