Across
- 2. a group of cells similar in shape and function
- 3. a condition that interferes with the well-being of an organism
- 7. system an organ system that includes the lungs, windpipe and blood vessels; delivers oxygen to the blood for distribution to all the cells of the body and eliminates waste carbon dioxide
- 8. the plant-cell structure containing many molecules of green pigment called chlorophyll that helps plants to make their own food
- 11. tiny cell structures within the cytoplasm that are specialized to carry out a specific function
- 12. microorganisms that live in moist areas; protists have a nucleus and contain mitochondria, ribosomes, and lysosomes
- 13. the most common form of microorganism; unicellular organisms that have no nucleus, no mitochondria, and no ribosomes
- 14. a chemical messenger from the organs of the endocrine system that tells cells in other organs how to adjust to what's going on inside and outside the body
- 16. a blood vessel that carries blood toward the heart
- 17. the cell structure in plant and animal cells that acts the control centre and directs all of the cell's activities
Down
- 1. the diffusion of water through a selectively permeable membrane
- 3. the movement of molecules from an area of high concentration to an area of lower concentration
- 4. a blood vessel that carries blood away from the heart
- 5. a living thing that can be seen only with the aid of a microscope
- 6. of view the area visible through a microscope
- 9. the process multi-cellular animals use to break large food molecules into smaller molecules for fuel, growth, and repair
- 10. wall the plant-cell structure that protects that supports the plant cell
- 15. systems groups of organs that have related functions
- 16. a fluid-filled space plants and animal cells that can store food and water