ham oxizen kaha se lete hai
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HAM OXYGEN TREE (PAIDO) SE LETE HAI
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we take oxygen through nostril nasal cavity pharynx trachea bronchus bronchioles and alveoli .The concentration of oxygen is greatest in alveoli and losses in blood capillaries connected with alveoli also concentration of co2 is maximum in blood capillaries and lesser in alveoli ,so by diffusion process oxygen enter to blood capillaries and combines with hemoglobins to form oxyhemoglobin and maues to each and every cell of body
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