| A | B |
|---|
| Cell | basic unit of living things |
| Tissue | made of cells |
| organ | made of tissue |
| organ system | made of organs |
| epithelial cell | used for covering or lining of the body |
| connective cell | used to attach things in the body |
| nerve cell | used to communicate information throughout the body |
| muscle cell | used for movement |
| organism | made of organ systems |
| digestive system | processes food |
| respiratory system | helps body absorb oxygen from the atmosphere, gets rid of carbon dioxide |
| circulatory system | moves chemical substances, mainly blood, through the body |
| nervous system | sends information throught the body (like a built-in IM) |
| musculoskeletal system | holds up body and helps it physically move |
| stomach | breaks down food |
| small intestine | absorbs nutrients from food |
| large intestine | "packs" waste for removal from body |
| liver | filters toxins from body |
| lung | organ that expands when air enters body |
| bronchi | inside lung |
| backbone | main support of vertebrates |
| ribs | part of skeletal system...protects internal organs around the chest |
| spinal chord | main "pathway" for messages sent within the nervous system. Located within the backbone. |
| urogenital system | includes excretory and reproductive systems |
| bladder | stores liquid waste in the body |
| diversity | differences among animals |
