What is alveoli ?explain
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Any of the many tiny body sacs of the lungs which allow for rapid gaseous exchange.
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Alveoli are tiny sacs in lungs where gaseous ezchange occurs. It is vey delicate and has many cappilaries on its surface. O2 from air diffuses into blood in cappilaries and CO2 from blood diffuses into air. Alveoli branches from bronchi.
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