The Human Body- The Skeletal and Muscular Systems
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13 terms
Terms | Definitions |
|---|---|
 Skeletal System | -gives the body shape -protects the internal organs -works with the muscles to move the body |
| spine | made of small bones that run down the back and keep it straight (sometimes called the backbone) |
| ribs | bones that attach to the spine and curve around to protect the heart and lungs |
| skull | the bony part of the head that protects the brain |
| cartilage | -flexible material that cushions the bones where they meet -it is softer than bones |
| ligaments | connects bone to cartilage and holds the joints together |
| hinge joint | allows bones to move back and forth (ex: knee or elbow) |
| pivot joint | allows bones to rotate around a point (ex: head moving on neck) |
| ball and socket joint | allows movement in many directions (ex: hip or shoulder) |
| muscular system | body system made of muscle that makes the body parts move |
| skeletal muscle | Muscles that move your bones. They can pull the bones, but not push. Skeletal muscles must work in pairs. (ex: biceps and triceps of the arm) |
| cardiac muscle | muscle found only in the heart |
| smooth muscle | -found in the blood vessels and many organs of the body -movements of these muscles are involuntary (they move without you having to think about them) |
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