Across
- 2. The sections of the small intestines that help with absorption by increasing the surface area.
- 7. The number of chambers in the heart.
- 8. These tiny structures prevent the blood from flowing backwards in the veins and heart.
- 9. These carry blood back to the heart
- 10. A group of cells working together to carry out a function.
- 12. These help to fight infection.
- 14. These help your blood to clot after an injury.
- 15. 78% of our air is...
- 16. The name of the solution used to test for starch.
- 17. The skin is an example of an...
- 18. These carry blood away from the heart.
Down
- 1. The place in our bodies that mixes food with acid.
- 3. The type of variable that we change in a reaction.
- 4. The intestines that absorbs water into our bodies.
- 5. The process that happens in the small intestines.
- 6. The name of the system responsible for digesting our food.
- 11. When we exercise our breathing rate...
- 13. A diet that contains the correct amount of each nutrient.