| A | B |
|---|
| integumentary system | skin, hair, and nails protect underlying tissue |
| muscular system | muscles and connective tissues move bones |
| skeletal system | bones provide frame to support and protect body parts. |
| cardiovascular system | heart pumps blood through all blood vessels |
| nervous system | receives and sends electrical messages throughout the body |
| lymphatic system | returns learked fluids to blood vessels; gets rid of germs |
| digestive system | breaks down the food you eat into nutrients that can be absorbed |
| endocrine system | glands which send chemical messengers to regulate body functions |
| respiratory system | lungs absorb oxygen and release carbon dioxide |
| urinary system | removes waste from the blood and regulates body fluids |
| reproductive system | produces sex cells |
