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Teachingbd24 - WordPress.com€¦ · Through breathing, animalsinahle 02and exhale C02. The 02 passes though the nasal duct and reaches lungs alveoli and enters into capillaries though

Oct 19, 2020

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    1.pdf (p.1)2.pdf (p.2)3.pdf (p.3)4.pdf (p.4)5.pdf (p.5)6.pdf (p.6)7.pdf (p.7)8.pdf (p.8)9.pdf (p.9)