Across
- 2. a non living component of an ecosystem
- 5. Eliminated waste
- 7. organ that serves as the center of the nervous system in all vertebrate and most invertebrate animals.
- 12. pair of breathing organs located with the chest which remove carbon dioxide from and bring oxygen to the blood.
- 14. small space in the tissues of an organism containing air, waste, fluids and nutrients
- 15. movement of oxygen from the outside environment to the cells within tissues, and the removal of carbon dioxide in the opposite direction
- 16. The muscle that separates the chest cavity from the abdomen.
- 20. a muscular tube that food passes through and absorbs nutrients
- 21. The skeleton of the head of a vertebrate animal
- 22. structural layer surrounding some types of cells, just outside the cell membrane.
- 23. The drawing of air or other substances into the lungs.
- 24. an organ that forms the skeleton of vertebrates.
- 26. the components of the circulatory system that transport blood throughout the human body.
- 28. muscular organ of vertebrates that moves blood through the body by repeated, rhythmic contractions.
- 29. community or group of living organisms that live in and interact with each other in a physical environment.
- 32. Part of the body that produces movement
- 33. raspatory system in birds, fish, insects and mammals
- 34. Plants convert this gas to oxygen during a process called photosynthesis
Down
- 1. The brain of a cell
- 3. Smallest structural and functional unit of an organism
- 4. when food is broken down and converted so it can be absorbed by an organism and used to maintain vital bodily functions.
- 6. an organelle within the cells of plants and certain algae that is the site of photosynthesis
- 8. basic unit of life in organisms of the kingdom Plantae.
- 9. Transmits impulses from one part of the body to another
- 10. also called germs, are microscopic organisms not visible with the naked eye.
- 11. a thick solution that fills each cell and is enclosed by the cell membrane.
- 13. an organ whose function is primarily for excretion of extra fluids as wastes.
- 17. a group of cells which is made to preform a specific function
- 18. separates the interior of the cell from the outside environment.
- 19. a living component of an ecosystem
- 25. a collection of tissues that structurally form a functional unit to perform a particular function.
- 27. a digestive sac where your food is held after swallowing.
- 29. part of breathing where the air is drawn out of the lungs
- 30. A cord that stretches from your brain down the the end of your spine
- 31. . A long hollow muscular tube that connects the pharynx to the stomach.