Wednesday 8 May 2013

Describe double circulation in human beings. Why is it necessary



11. Describe double circulation in human beings. Why is it necessary?
Ans. During a single cycle blood goes twice in the heart which is known as double circulation. It is necessary in human being to separate oxygenated and de-oxygenated blood because this makes their circulatory system is more efficient and helps in maintaining constant body temperature.
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17 comments:

  1. Unknown15 September 2013 at 04:13

    this answer might not gain full marks in exams.

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    Replies
    1. naruto review20 July 2016 at 18:40

      Hey u dont know to study I got full marks

      Delete
    2. naruto review20 July 2016 at 18:40

      Hey u dont know to study I got full marks

      Delete
    3. Chaoticmind22 September 2018 at 08:23

      U will surely get...my teacher told me same

      Delete
  2. ANURAG GAUTAM6 April 2014 at 01:30

    Double circulation describes the fact that our oxygenated and deoxygenated blood is kept separate in our hearts. In fish (two-chambered heart) and amphibians (three-chambered heart), the oxygenated and deoxygenated blood is allowed to mix in the ventricles, in mammals and birds (four-chambered heart), the oxygenated and deoxygenated blood is kept separate. Fish and amphibians are cold-blooded, meaning that they conform to the temperature of their environment. Mammals and birds are warm blooded. They maintain a constant internal temperature, despite the environment. Maintaining a constant internal temperature allows mammals and birds to carry-out body processes more efficiently, but it requires more energy. Without double circulation, the body tissues would not receive enough oxygen to maintain a constant temperature, and would die.

    In response to the above answer, some amphibians have lungs. Having lungs does not mean an organism has a double circulatory system.

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    Replies
    1. Android - Studio Code Examples10 May 2014 at 21:29

      Thanks Anurag Gautam for your detailed explanation

      Delete
    2. Unknown16 January 2018 at 08:39

      But why the number of Chambers in a heart depends upon diversity in species ?...Please explain me sir

      Delete
  3. Prashant 14 May 2014 at 09:50

    In human beings and other vertebrates, the blood goes through heart twice during each cycle. This process is known as double circulation. Deoxygenated blood enters through right auricle and then it enters right ventricle from where it is pumped to lungs for oxygenation. From lungs after oxygenation it comes to left auricle and enters left ventricle from where it is pumped to various parts of body.

    Advantages:

    It helps in keeping oxygenated and De-oxygenated blood completely separated.
    It increases the efficiency of oxygen in the body.

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  4. Unknown25 May 2015 at 21:45

    I like the way Prashant has answered to the question .

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  5. Unknown25 May 2015 at 21:45

    I like the way Prashant has answered to the question .

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  6. Unknown9 November 2015 at 16:51

    This comment has been removed by the author.

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  7. Unknown9 November 2015 at 16:51

    i like the the prasanth reply AND i also filled that in my note book thanks 2 praanth

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  8. Unknown9 November 2015 at 16:52

    i like the the prasanth reply AND i also filled that in my note book thanks 2 praanth

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  9. Unknown4 July 2017 at 01:53

    Oh i really like that reply

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  10. Unknown4 July 2017 at 01:54

    Your reply is good prasanth

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  11. Unknown24 June 2018 at 16:58

    u r 2 good

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  12. Unknown29 September 2018 at 07:37

    Helpful

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