Wednesday, 13 February 2013

2.27 understand the processes of ingestion, digestion, absorption, assimilation and egestion

Digestion: process in which large insoluble molecules of food are broken down into smaller ones.


Absorption: the process by which soluble molecules produced by digestion are taken from the gut (occurs mostly in the small intestine.) The soluble products of digestion are then transported to the various tissues by the circulatory system.

Assimilation: the cells of the tissues absorb the molecules for use.

Egestion: removal of waste- undigested- products as faeces.

Excretion: removal of waste products that have been in the body.
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24 comments:

  1. William1 June 2014 at 02:34

    Injestion: Ingestion is the consumption of a substance by an organism. In animals, it normally is accomplished by taking in the substance through the mouth into the gastrointestinal tract, such as through eating or drinking. (Wikipedia)

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  2. William2 April 2015 at 04:00

    Excretion is removing waste products of respiration, so basically carbon dioxide. I used to mix it up with egestion all the time, but in egestion it's never respired so it's not technically a waste product, just unused food.

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    1. Unknown11 May 2015 at 02:48

      u are better than hannah

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    2. Unknown10 November 2016 at 23:44

      Thank you for the extra detail you gave :D *egestion is a waste product - metabolic waste

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    3. Unknown10 June 2018 at 07:56

      This comment has been removed by the author.

      Delete
  3. lol cats3 January 2016 at 16:50

    MUJAHID ISLAM SHUT UP HAVE YOU GOT NOTHING BETTER TO DO BUT COMMENT ON HANNAH'S BLOG. GET A LIFE AND STOP COMPLAINING, I DIDN'T SEE YOU WRITE ONE!!! Thank you very much Hannah, everything is useful ;) .

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    1. Unknown16 April 2016 at 05:43

      Oh my

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    2. Anonymous14 May 2016 at 20:04

      Then why're you here, Algernon a-seymour?

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    3. Anonymous14 May 2016 at 20:04

      Then why're you here, Algernon a-seymour?

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    4. Peace15 May 2016 at 13:24

      Peace is the way to success (In this case A* in Biology IGCSE)

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    5. Unknown9 June 2016 at 08:37

      simmer down lads

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    6. Unknown9 June 2016 at 08:38

      simmer down lads

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    7. Anonymous9 August 2016 at 05:29

      typical

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  4. Unknown15 May 2016 at 08:34

    Egestion is the removal of waste products from the anus pretty important to mention it happens there

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  5. Unknown2 June 2016 at 00:15

    Great Blog Hannah! Thanks for the informatiom :) It's very much appreciated ;)

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  6. Unknown2 June 2016 at 00:16

    *information

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  7. Anonymous9 August 2016 at 05:30

    thanks Hannah, life saver

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  8. Unknown10 November 2016 at 23:45

    This comment has been removed by the author.

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  9. Unknown14 February 2017 at 11:59

    *flaws

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  10. Anon11 March 2017 at 07:53

    GG

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  11. Alice1 May 2017 at 07:56

    This comment has been removed by the author.

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  12. Mike Tsang26 June 2017 at 02:41

    The Biology Syllabus has changed.... New Syllabus Blog:

    http://igcse-biology-2017.blogspot.hk

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  13. SophieRice26 June 2017 at 07:47

    look at here for more

    http://igcse-biology-notes.blogspot.hk/2017/06/227-understand-process-of-ingestion.html

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  14. Unknown23 December 2017 at 02:14

    i think you missed out ingestion on your definitions

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