Across
- 3. natural chemical in the brain that helps relieve pain, reduce stress and boost feelings of happiness
- 4. when your body reacts badly to things like pollen or dust
- 6. taking in sufficient water
- 7. overwheight due to the gain of calories
- 8. the energy process your body uses to turn food into energy
Down
- 1. a complex network of cells, tissues, organs, and the substances they make that helps the body fight infections and other diseases
- 2. medical specialisation of the heart and blood vessels
- 5. the energy you get from food to help your body move and grow
- 6. the scientific study of how to preserve health and prevent disease