Across
- 1. Type of muscle tissue under involuntary control.
- 5. A model expressing mathematical relationships within a system.
- 10. The study of biological systems as a whole.
- 12. System type where energy flows but matter does not.
- 13. Organelles that provide support and shape to plant cells.
- 15. Organelles found in plant cells but not in animal cells, involved in photosynthesis.
- 16. The system responsible for gas exchange in the body.
- 17. The jelly-like substance within a cell.
- 18. Information from one step of a cycle that acts to change a previous step.
- 19. The system that transports nutrients and oxygen.
Down
- 2. The protective outer layer found in all cells.
- 3. The maintenance of constant internal conditions in an organism.
- 4. Energy source for the cell, often called the powerhouse.
- 6. A group of similar cells performing a specialized function.
- 7. A system with no inputs or outputs flowing out.
- 8. A cell organelle that stores genetic information.
- 9. Cells without a nucleus, such as bacteria.
- 10. Living components of an ecosystem.
- 11. Nonliving components of ecosystems.
- 14. A set of interacting components considered as a single unit.