| A | B |
|---|
| bone | type of body tissue made of both living cells and nonliving material |
| 206 bones | number of bones in the adult human body |
| skeletal system | all the bones in the body, together with the tissues that bind and protect the bones |
| joint | place at which 2 bones meet |
| ligaments | strong bands of fiber that hold movable joints together; allow for some movement while keeping the bones in place |
| cartilage | a tissue much like bone but softer and more flexible; protects bones at the joints; also found in the nose and ears |
| long bone structure | enlarged at both ends with a shaft inbetween the ends |
| periosteum | a membrane that covers the bone |
| compact bone | a layer of very hard material under the periosteum; gives the bone its strength |
| spongy bone | material beneath the layer of compact bone; softer than compact bone; has many hollow spaces which act as shock absorbers |
| marrow | soft tissue found inside the shaft of long bones; where the body's blood cells are produced |
| skeleton | gives you shape; supports other body parts; allows you to stand erect; protects soft organs inside the body |
| movable joints | joints that allow for the movement of bones |
| immovable joints | places where bones come together but there is no movement |
| ball and socket joint | joint that allows for a great range of motion; a full swing of the bone; the hip is an example |
| pivot joint | joint that allows bone to turn ; the neck is an example |
| hinge joint | joint that allows for a back and forth movement like a door opening and closing; the knee is an example |
| gliding joint | joint that allows for a great range of motion; one bone slides over another; the ankle is an example |
| skeletal muscles | muscles that are attached to bone; they move your bones |
| smooth muscles | muscles that push food through the digestive system |
| cardiac muscles | muscles of the heart that cause it to beat |
| tendons | strong, ropelike fibers that attach muscles to bones |
| sprain | tearing of a ligament at a joint |
| strain | overstretching or slight tearing of a muscle or a tendon that holds the muscle to the bone |
| fracture | any break or crack in the bone |
