1									2
3					4
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		6					7					8
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				18	19					20
	21	22												23
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							25

Across 1. lubricates pleural membranes and prevents friction 5. cavity where lungs, heart, and major blood vessels are located 7. throat 9. where air enters 10. recieves air and food 12. smallest branches of the bronchi 13. area between the two pleural layers 16. carries air between the pharynx and bronchi 18. opening between the vocal cords 21. sac or membrane that surrounds the lung 23. type of pleura attaced to the chest wall 24. nostrils 25. number of lobes of the right lung

Down 2. bottom portion of pharynx 3. air sacs 4. lipid substance that coats the inner surface of the alveoli 6. carries air from the trachea to the lung 8. upper portion of pharynx 11. wall of cartliage that divides the nose into 2 hollow spaces 14. cartilage that closes the opening into the larynx during swallowing 15. type of pleura attached to the surface of the lung 17. hairlike structures, they filter air to trap dust 19. voice box 20. cavities in skull around nasal area, they provide resonance for voice 22. organs where the divisions of the bronchi and alveoli are found 25. number of lobes of the left lung