Across
- 2. A large sheet of muscle that separates the lungs from the abdominal cavity
- 6. The many small, branching tubules into which the bronchi subdivide.
- 9. Sets of muscles between the ribs which raise and lower the rib cage.
- 10. When particles spread out from a region of higher concentration to a region of lower concentration.
- 11. The ribs and upper backbone, and the organs found in the chest
Down
- 1. A gaseous compound of carbon and oxygen, which is a by-product of respiration, and which is needed by plants for photosynthesis.
- 3. The plural of 'bronchus'. The bronchi are the two major air tubes in the lungs.
- 4. Tiny air sacs in the lungs, where gas is exchanged during breathing.
- 5. Thin, moist membranes surrounding the lungs that make an airtight seal.
- 7. The major airway in the respiratory system, also known as the windpipe, connecting the pharynx and larynx to the lungs
- 8. Tiny hair-like projections from a cell that usually allow it to move a substance past the cell