Wednesday 8 May 2013

How are the lungs designed in human beings to maximise the area for exchange of gases



4. How are the lungs designed in human beings to maximise the area for exchange of gases?
Ans.  Lungs contain millions of alveoli which provide a surface for the exchange of gases. An extensive network of blood vessels is present in the wall of the alveoli. By lifting our ribs and flatten the diaphragm, the chest cavity becomes spacious. Air is sucked into the lungs and alveoli. The oxygen from the breath, diffuses into the blood and CO2 from the blood brought from the body, diffuses out into the air.
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27 comments:

  1. Anonymous18 May 2016 at 08:12

    The answer was highly helpful. thanks!!!!!!!!!!

    ReplyDelete
  2. Unknown3 July 2016 at 08:52

    Very helpful answer

    ReplyDelete
  3. shibil31 August 2016 at 07:12

    Thx

    ReplyDelete
  4. Unknown8 September 2016 at 17:09

    Useful thank u

    ReplyDelete
  5. Unknown8 September 2016 at 17:13

    Useful thank u

    ReplyDelete
  6. Unknown15 May 2017 at 10:36

    Awesome answer

    ReplyDelete
  7. Anurag Singh6 June 2017 at 09:28

    This comment has been removed by the author.

    ReplyDelete
  8. Unknown11 June 2017 at 04:43

    Good answer,was really helpful to me.Thank you!!!!

    ReplyDelete
  9. Unknown11 June 2017 at 04:43

    Good answer,was really helpful to me.Thank you!!!!

    ReplyDelete
  10. Anonymous13 June 2017 at 06:26

    It really helped for me...thanks!!!

    ReplyDelete
  11. Bakchodi18 June 2017 at 05:51

    Lund

    ReplyDelete
  12. Unknown28 June 2017 at 08:43

    Good at all

    ReplyDelete
  13. Unknown28 June 2017 at 08:43

    Good at all

    ReplyDelete
  14. Unknown28 June 2017 at 21:04

    Add one more question in this please."Why the air passage does not collapse when there is no air in it?"

    ReplyDelete
    Replies
    1. Unknown7 July 2017 at 07:22

      Its because of the presence of cartilage rings

      Delete
  15. sailajasanker18 August 2017 at 07:46

    It is very useful answer .Thank-you so much .

    ReplyDelete
  16. Unknown26 November 2017 at 09:08

    Keep answering it is very usefull

    ReplyDelete
  17. Unknown21 February 2018 at 02:48

    This comment has been removed by the author.

    ReplyDelete
  18. Unknown21 February 2018 at 02:48

    This comment has been removed by the author.

    ReplyDelete
  19. Unknown30 August 2018 at 07:06

    Thanxx it's help full

    ReplyDelete
  20. Unknown22 September 2018 at 08:33

    Excellence answer

    ReplyDelete
  21. Unknown26 January 2019 at 07:12

    Tnq.
    Very Much respected. Teachers

    ReplyDelete

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