Bio

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Across
  1. 5. The main component of the blood that carries red blood cells.
  2. 6. substance where chemical reactions occur; contains organelles.
  3. 9. Insoluble protein that forms a mesh to clot blood.
  4. 11. The process where plants use sunlight, carbon dioxide, and water to make glucose and oxygen.
  5. 12. Chemical messengers released by neurons to transmit signals across synapses to other neurons, muscles, or glands.
  6. 16. energy
  7. 17. a simple sugar that is the main source of energy for cells
  8. 18. The maintenance of a stable internal environment
  9. 19. Tiny air sacs in the lungs where gas exchange (oxygen in, carbon dioxide out) happens.
Down
  1. 1. Small branching airways that carry air to the alveoli in the lungs.
  2. 2. The chemical process in cells that releases energy from glucose
  3. 3. The two main tubes branching from the trachea, carrying air into each lung.
  4. 4. Plant tissue that transports water and minerals upward and provides support.
  5. 7. Glands that secrete hormones directly into the bloodstream to regulate growth.
  6. 8. CO2
  7. 10. Organelle containing chlorophyll where photosynthesis occurs.
  8. 13. The control centre of a cell, containing DNA that directs growth, reproduction, and metabolism.
  9. 14. The movement of materials within an organism.
  10. 15. A sheet of muscle below the lungs that contracts for inhalation and relaxes for exhalation.