Across
- 2. the main source of energy for the body
- 3. the main part of the respiratory system
- 5. the insulator of the axon
- 6. makes digestive juices and controls insulin
- 8. receptors on the end of a neuron
- 10. the first part in the digestive process
- 11. a protein found in red blood cells
Down
- 1. contain enzymes to break down substances
- 4. the brain of the cell
- 7. the nervous system that uses the brain and spine
- 8. the variable that's being tested in an experiment
- 9. The order in which mitosis happens