Across
- 4. ___________ circuit allows electric current to flow through it.
- 5. system that breaks down food into simple substances for easy absorption
- 7. the cell membrane controls the substances that _______ or leaves the cells
- 10. system where the blood transport oxygen, digested food and water to all parts of a human body. The blood carries carbon dioxide and waste materials away from different parts of the human body
- 11. water-carrying tubes transport __________ and dissolved minerals from the roots to the other parts of the plant
- 12. ____________ of electricity do not allow electric current to flow through in the circuit.
Down
- 1. the basic unit of life
- 2. food-carrying tubes transport food made in the _________ to the other parts of the plant (roots, stem, flowers and fruits)
- 3. contains chlorophyll that absorbs light energy for photosynthesis.
- 6. Respiration is a process where plants or animals take in oxygen to release energy from digested food.
- 8. tiny openings that allow gases such as oxygen and carbon dioxide to enter or leave a plant
- 9. photosynthesis is a process where ________ leaves use water and carbon dioxide to make food in the presence of sunlight