Lungs have numerous alveoli to increase surface area for diffusion of gases; alveoli have thin
membrane which minimizes resistance against gases; blood flowing in the capillaries contains
less oxygen and more C02 since it is from the body tissue; alveoli are supplied with air through bronchioles which link them to the trachea; alveoli are supplied with many capillaries containing
blood to transport gases; air in the alveoli contain more oxygen and combine with haemoglobin,
forming oxyhaemoglobin; C02 diffuses out of the blood into the alveoli ;from where it is exhaled;
sharon kalunda answered the question on May 22, 2019 at 10:53
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