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Watch Later 3:24

By: t0906, Views: 1307

Biological Concept-Ch.7 (5) - Respiratory system Pharynx

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By: t0906, Views: 1419

Biological Concept-Ch.7 (6) - Respiratory system Trachea Bronchi Bronchioles

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By: t0906, Views: 1408

Biological Concept-Ch.7 (7) - Respiratory system Air Sacs

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By: t0906, Views: 1336

Biological Concept-Ch.7 (8) - The respiratory system Lungs

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By: t0906, Views: 864

Biological Concept-Ch.7 (9) - The differences between inhaled gas and exhaled gas

Watch Later 4:51

By: t0906, Views: 2682

Biological Concept-Ch.7 (10) - Gas Exchange

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By: t0906, Views: 2112

Biological Concept-Ch.7 (11) - Adaptive features of air sacs

Watch Later 3:56

By: t0906, Views: 1328

Biological Concept-Ch.7 (12) - Emphysema

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By: t0906, Views: 1277

Biological Concept-Ch.7 (13) - Transport of respiratory gases

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