Across
- 3. the wavelike contractions of smooth muscles that moves material through the digestive system
- 6. resistance to a sickness
- 8. a group of organisms of the same species that live in a particular area
- 9. a chemical marker on a cell’s surface that indicates whether a cell is from your body or is a foreign material
- 11. a particular environment and all the living things supported by it
- 13. a disease causing agent
- 16. liquid waste transported by the urinary system
- 17. the lower end of a river that feeds into the ocean, where fresh water and salt water mix
- 18. a tissue made up of plasma, red blood cells, white blood cells, and platelets
- 19. chain the feeding relationship between a producer and a single chain of consumers in an ecosystem
Down
- 1. the process of breaking down food into usable materials
- 2. an organism that captures energy and stores it in food as chemical energy
- 4. a series of events that happen over and over again
- 5. the system that transports liquid waste out of the body
- 7. the physical location where plants and animals live
- 10. the role an organism plays in its habitat
- 12. a vessel that carries blood away from the heart
- 13. an animal that is eaten by another animal
- 14. important substances that enable the body to move, grow, and maintain homeostasis
- 15. an animal that eats another animal