Biology

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

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.