Human systems in the body

123456789
Across
  1. 4. Digestion takes place in the mouth, stomach and the ___ intestine.
  2. 6. The _____ system breaks down food into simple susbtances.
  3. 8. The _____ system takes in oxygen and removes carbon dioxide.
  4. 9. Digestion first takes place here.
Down
  1. 1. The respiratory system consists of the nose, windpipe and ___.
  2. 2. The circulatory system is made up of blood vessels, blood and the ___.
  3. 3. It is found in the mouth which breaks down the food.
  4. 5. The _____ system transports blood throughout the body.
  5. 7. Blood contains food, waste materials and ____ which is needed for survival.