Across
- 2. holds the organs above it so they don't fall down when the lungs exhale
- 4. This is where the respiratory system starts
- 5. they bring oxygen into our bodies and send carbon dioxide out
- 7. They expand during inhalation taking in oxygen, and shrink during exhalation expelling carbon dioxide
- 8. allows the passage of inspired and expired air into and out of the lung
Down
- 1. It protects your trachea so food doesn't go into our lungs
- 3. receiving air from the nasal cavity and air, food, and water from the oral cavity
- 4. air filled space above and behind the nose in the middle of the face
- 6. to deliver air to a diffuse network of around 300 million alveoli in the lungs