Across
- 2. Specialized cells in the respiratory tract that secrete mucus to trap pathogens and dust
- 4. A carcinogen in cigarette smoke that stimulates excess mucus production and clogs cilia
- 5. Tiny air sacs in the lungs where gas exchange occurs
- 7. Pores found mainly on the underside of leaves that allow for the exchange of CO2
- 10. A type of respiration that breaks down nutrient molecules to release energy without using oxygen
Down
- 1. The type of acid that builds up in muscles during vigorous exercise, causing fatigue and an oxygen debt
- 3. The windpipe that connects the throat to the bronchi and is supported by C-shaped cartilage rings
- 6. A thin sheet of muscle that flattens to increase the volume of the chest cavity during inhalation
- 8. The alcohol produced as a byproduct of anaerobic respiration in yeast
- 9. The movement of gas molecules from an area of high concentration to an area of low concentration