Across
- 4. directs air into the lungs
- 8. lower part of the heart
- 9. the basic unit of life
- 10. absorbs water from food where waste is stored before being removed
- 12. muscular tube that connects the mouth to the stomach
- 15. upper part of the heart
Down
- 1. organ where most of the nutrients are absorbed from the food
- 2. filters waste from blood and turns it into urine
- 3. muscle at the bottom of the chest cavity that helps with breathing
- 5. airways in the lungs that lead to the alveoli
- 6. tube where air goes down to get to the lungs
- 7. little fingerlike structures that line the inside of the small intestine and absorb nutrients
- 11. organ that exchanges carbon dioxide for oxygen
- 13. organ where food is continued to get broken down uses chamical and mechanical digestion
- 14. tiny air sacs of lung tissue that move gasses between air and blood