Saturday, 23 February 2013

2.68 recall that the lungs, kidneys and skin are organs of excretion

Lungs
Carbon dioxide- a waster product from respiring cells- is diffused into the lungs and then breathed out.

Kidneys
Excess water, urea (amino acids) and salts are diffused into the kidneys.

Skin
Water and salts are excreted through the skin.
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7 comments:

  1. Unknown13 June 2014 at 10:39

    I think you missed out 2.67

    ReplyDelete
    Replies
    1. simcam13 January 2015 at 10:52

      This comment has been removed by the author.

      Delete
    2. Unknown28 May 2015 at 19:42

      Pretty sure you missed 2.67.(understand the origin of carbon dioxide and oxygen as waste products of metabolism and their loss from the stomata of a leaf)

      Delete
    3. Unknown16 June 2015 at 08:03

      2.67: http://hannahhelpbiology.blogspot.hk/2013/02/267-understand-origin-of-carbon-dioxide.html

      Delete
    4. Anonymous15 May 2016 at 08:56

      bio exam tmrw all of you go do one.

      Delete
  2. Mike Tsang26 June 2017 at 03:03

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

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

    ReplyDelete
  3. SophieRice26 June 2017 at 18:20

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/268-recall-that-lungs-kidneys-and-skin.html

    ReplyDelete

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