Respiratory System

1. Tubes that connect your trachea and direct the air you breath
3. the action of breathing in
8. also called the throat, carries food and fluid down from the nose and mouth
10. a pair of organs located in your chest that give oxygen to your body and removes carbon dioxide
13. Tough tissue that lines joints and gives structure to your nose, ears and other parts of your body
14. the intercostal spaces
15. a flap that essentially protects the lungs from food entering
16. movement of molecules in a substance when in high concentration
17. cords bands of muscle that vibrate to create noise and your voice

2. when organisms combine oxygen and foodstuff molecules
4. an airway that leads from your voice box to the bronchi
5. a protein found in red blood cells that carries oxygen in your body
6. smaller branches of the bronchial airways
7. the action of breathing out
9. many of the tiny air sacs which allow gas exchange
11. two layers of muscle fibres occupying each
12. also called the voice box, holds the vocalcords and is a air passage so that we can talk and breath