| A | B |
|---|
| chemicals | elements, atoms, molecules; the first and non-living level |
| cells | the first level that is living, includes a nucleus, cytoplasm, membrane, and many organelles |
| tissues | groups of similar cells working together to perform a function |
| organs | groups of different tissues working together to perform a function |
| systems | groups of organs working together to perform a function |
| whole body | all the systems working together |
| integumentary | covers and protects the body |
| cardiovascular | carries blood through the body, transporting nutrients, oxygen, wastes, etc. |
| immune | protects from infection and other foreign invaders in the body |
| respiratory | brings oxygen into the body, rids the body of carbon dioxide |
| digestive | breaks down food into forms the body can use |
| urinary | filters blood, eliminates liquid waste |
| endocrine | controls body activities through hormones |
| nervous | controls body activities through generating and transmitting impulses |
| sensory | picks up information from the environment and sends it to the brain |
| skeletal | provides framework for support and protection of body |
| muscular | moves the body |
| reproductive | provides way to carry on the species by making new babies |
| types of tissues | epithelial, connective, muscle, nerve |
| examples of organs | heart, lungs, liver, eye, skin |
