Question:
How are the lungs designed in human beings to maximize the area for exchange of gases
Answer:
The terminal end of the respiratory tract in human beings are the alveoli present in the lungs which are the site of gaseous exchange. These alveoli are globular structures present in millions of numbers and occur in sacs surrounded by capillaries. The extensive capillary network around the alveoli ensures maximum gaseous exchange between the blood coming from the body and the oxygen-rich air coming into the alveoli upon inhalation.
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