Across
- 3. The state of equilibrium, or balance, in the body despite changes in the external environment
- 7. A scientific instrument that magnifies very small objects
- 11. A tissue that covers the exterior and interior body surfaces
- 12. A group of different tissues that work together to perform a specific body function
- 14. A tissue that carries electrical messages between the brain and the body
- 16. The movement of nutrients from the digestive system into the bloodstream
- 18. The basic unit of structure and function in all living things
- 19. Fats and oils; very energy rich organic compounds made of C, H and O; main component of cell membranes
- 20. A substance obtained from food that is needed by the body to carry out its functions
- 22. The cell's “command center”; contains DNA
- 23. Nickname of the cell membrane
- 25. A group of similar cells that perform a specific function
- 26. Where two bones come together and body movement occurs
- 27. Large organic compounds made of C, H, O and N
Down
- 1. A tissue that contracts (shorten) to move body parts
- 2. Sugars; energy rich organic compounds made of C, H and O
- 4. A tiny structure within a cell that performs a specific function
- 5. Nickname of the mitochondria
- 6. Many cell organism (e.g., plants and animals)
- 8. The property of a biological membrane that allows only certain molecules or ions to pass through
- 9. A plant organelle that converts sun energy into food energy (photosynthesis)
- 10. A nucleic acid containing all the info for cell functions; passed from parent to offspring
- 13. A body's reaction to a stimulus
- 15. One cell organism (e.g., bacteria)
- 17. An environmental signal that causes your body to react
- 18. A tissue that supports and connect body parts
- 21. A living thing composed of cells
- 24. Special proteins that speed up chemical reactions in living organisms