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Human Body Week 2
| Term | Definition |
|---|---|
| tissue | A group of cells that work together to carry out a particular task (job) in an organism. |
| organs | A group of tissues that perform a complex function (job) in a body. Examples: lung, heart, liver) |
| organ systems | A group of organs that work together to perform a certain task (job). |
| multicellular organisms | An organism made up of many cells. |
| microscope | A device used by scientists to observe (see) extremely small objects or organisms. |
| cell wall | A stiff structure that surrounds and protects a cell. Found in plants. |
| organelles | A tiny structure within a cell that performs a specific function (job) for that cell. They float in the cytoplasm of the cell. |
| skeletal system | The system that is made up of all the bones in the body. |
| bones | The organs that make up a skeleton. |
| bone marrow | Spongy material inside long bones that produces blood cells. |