Friday, 22 February 2013

2.57 describe the composition of the blood: red blood cells, white blood cells, platelets and plasma

The blood has several different components.
55% of the blood is plasma: yellow liquid containing water with different things dissolved in it.
There are many red blood cells (Erythroeytes.)
There are less white cells: Phagosytes; lymphosytes.
Platelets (dead red blood cells) which play an important role in clotting.
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9 comments:

  1. Unknown11 May 2015 at 04:41

    Are u sure that platelets are dead rbc

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    Replies
    1. Unknown6 October 2015 at 11:13

      yes...they are...platelets are frgments of larger cells that are ruptured prior to entering the bloodstream...

      Delete
  2. Unknown11 May 2015 at 06:42

    yep they are fragments of dead cells

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  3. Unknown20 February 2016 at 07:43

    *fewer white cells

    ReplyDelete
  4. Unknown4 April 2016 at 12:53

    Red blood cells are erythrocytes not erythroetes ;)

    ReplyDelete
  5. Mike Tsang26 June 2017 at 02:54

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

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

    ReplyDelete
  6. SophieRice26 June 2017 at 18:10

    more at

    http://igcse-biology-notes.blogspot.hk/2017/06/257-describe-composition-of-blood-red.html

    ReplyDelete

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