Across
- 4. A single pathway showing how energy moves from one organism to another
- 7. The curved path of a celestial object around a star or planet
- 8. The tube that connects the mouth to the stomach
- 12. The largest planet in our Solar System, a gas giant
- 13. Tiny air sacs in the lungs where gas exchange happens
- 14. Refers to the non-living components of an ecosystem
- 16. Tiny blood components that help with clotting
- 18. Long tube where most nutrient absorption occurs
- 19. The planet closest to the Sun
- 20. Blood vessels that carry blood back to the heart
- 23. Organism that obtains energy by feeding on other organisms
- 24. Gas we breathe in, vital for life
- 26. Organism that breaks down dead organic matter
Down
- 1. Fluid that carries oxygen, nutrients, and waste in the body
- 2. Tiny blood vessels where gas and nutrient exchange happens between blood and cells
- 3. To breathe out
- 5. The natural home or environment of an animal or plant
- 6. The star at the center of our Solar System
- 9. Main organs of the respiratory system
- 10. Refers to the living components of an ecosystem
- 11. Organ that pumps blood throughout the body
- 13. Blood vessels that carry oxygenated blood away from the heart
- 15. Organism that makes its own food, like a plant
- 16. A large celestial body that orbits a star
- 17. Large organ that produces bile and filters blood
- 21. Muscular organ where food begins to break down with acid
- 22. Process of breaking down food into smaller molecules
- 23. Waste gas exhaled from the body
- 25. The force that pulls objects towards each other, holding planets in orbit
- 27. Earth's natural satellite