SELECT * FROM question_mgmt as q WHERE id=3656 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=257 and ex_no='6' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Life Processes how are the alveoli designed to maximise the excha

Question:

How are the alveoli designed to maximise the exchange of gases?

Answer:

Exchange of the gases takes place in the alveoli. They have a balloon- like or pouch like structure which provides the maximum area for the exchange of gases. Alveoli are the tiny air sacs made up of squamous epithelium, which are present in the lungs and are thin walled, network of blood vessels are present for the exchange of gases. Numerous alveoli in the lungs show the maximum area for the exchange of gases between the air in the alveoli and into the blood in their surrounding capillaries and diffusion of oxygen occurs through this way. And, the diffusion of carbon dioxide occurs from the blood through the thin walls into the alveoli.


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