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Themed 15x15 Freeform Crossword - Compiled By pjames57
Date: 30 Jan 2013
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Across
1. the site of gas exchange (7)
4. The build up of mucus in the alveoli wil......the rate of diffusion of gases (6)
5. Tiny hairs which help remove dust freom the Trachea (5)
6. airway leading from the larynx to the bronchus (7)
7. The protein un Red Blood cells which oxygen binds to (11)
Down
2. The muscles between the ribs (12)
3. breathing in (11)