| A | B |
|---|
| cardiac muscle | muscle that is only in the heart |
| involuntary muscle | muscle that cannot be controlled |
| muscle | strong tissue that can contract in an orderly way |
| skeletal muscle | the type of muscle that attaches bones |
| smooth muscle | involuntary muscles named for its smooth appereance |
| voluntary muscle | muscle that can be controlled |
| bruise | an injury where blood vessels in the skin are broken, but the skin is not open |
| dermis | a thick layer of skin that gives it strength, nourishment, and flexibility |
| epidermis | the outer layer of skin and the only layer with contact to enviroment |
| integumentary system | made up of all of the external coverings of the body |
| melanin | a pigment that protects the body by absorbing some of the Sun`s rays |
| calorie | the amount of energy it takes to raise water tempature |
| carbohydrate | a molecule that is made up of carbon, hydrogen, and oxygen atoms. Bodys main source of energy |
| fat | provides energy and helps the body absorb vitamins |
| mineral | a nutrient that does not contain carbon that helps regulate chemical reactions |
| protein | molecule made of amino acides |
| vitamin | nutrient that is needed in small amounts for growth, regulating body functions, and preventing some diseases |
| chemical digestion | the breakdown of food into small molecules |
| chyme | formed when food mixes with gastric juices in the stomach |
| digestion | mechanical and chemical breakdown of of food into smaller particales |
| enzyme | protein that helps break down larger molecules into smaller molecules |
| esophagus | muscular tube that connects the mouth to the stomach |
| mechanical digestion | physical breakdown of food |
| peristalis | waves if muscle contractions that move food through the esophagus and the rest of the digestive tract |
| villi | fingerlike projections that cover the folds of the small intestine |
| bladder | a muscular sac that holds urine |
| excretory system | collects and elimates wastes from the body and regulates fluid level |
| kidney | bean shaped organ that filters waste from blood |
| nephrons | netqork of small tubes where filteration of blood occurs |
| ureter | a tube where urine leaves the kidney |
| urethra | tube where urine leaves the bladder |
| urine | fluid produced when blood is filtered |
