Across
- 6. pacemaker of the heart
- 7. a type of neuron that causes movement
- 10. a chronic lung condition
- 11. where T cells mature
- 14. protective sac around the heart
- 15. command centre of the cell
- 17. the loop of Henle is found here
Down
- 1. a nerve cell
- 2. digestive enzyme found in saliva
- 3. process of cell division
- 4. storage place for bile
- 5. a bone of the lower leg
- 8. compound required for bone development
- 9. hormone secreted by the pancreas
- 12. white blood cells that engulf pathogens
- 13. valve between the left atrium and ventricle
- 15. millions of these are in the kidney
- 16. the largest organ in the body