Across
- 3. Dioxide What gas is ruining our planet's atmosphere?
- 6. The 8th element on the periodic table and the single most vital element to life
- 9. A series of chemical reactions that breakdown food
- 11. A set of rules, an arrangement of things, or a group of related things that work toward a common goal
- 16. A chemical reaction that breaks down larger molecules
- 18. system A system that helps you breath
- 19. A process where particles move from an area of high concentration to an area of low concentration
- 20. Blood vessels that have valves to prevent the blood flowing backwords
- 21. Unwanted or unusable materials
Down
- 1. system A system that circulate your blood and transports nutrients
- 2. They do most of the work in cells and are required to make the body's tissues and organs
- 4. cellular respiration something that occurs in every cell of almost every living thing.
- 5. An organ that helps you breath
- 7. usable food for green plants ;sugar
- 8. The smallest unit of of life, the building blocks of life
- 9. The power house of the cell
- 10. Small blood vessels that form networks throughout the bodily tissues.
- 12. A chemical reaction that builds large molecules
- 13. It is an important part of a healthy diet and gives you energy.
- 14. system A system that helps you breakdown the food you eat
- 15. Blood vessels carries blood away from the heart and toward other tissues and organs
- 17. The energy that runs the cells in our bodies.
- 21. What makes up an ocean?