Thursday, 3 January 2013

2.1 describe the levels of organisation within organisms: organelles, cells, tissues, organs and systems.


Organelles are highly organised structures of molecules. They have a specific function within a cell. Mitochondria is an example, generating energy for our bodies cells.

Cells are made up of Organelles, described as a functional unit, they are the basis of living things.

Tissues are a collection of similar cells all serving a common function.

Organs are made up of several kinds of tissues together forming a functioning unit.

Systems are several organs forming an organ system. Like the cardiovascular system is made up of the heart, blood and blood vessels.

This animation sums up the above nicely, worth a watch: http://wps.pearsoncustom.com/wps/media/objects/3014/3087289/Web_Tutorials/01_A02.swf

22 comments:

  1. Thank you! Your blog helped me out so much! xx

    ReplyDelete
  2. No problem! I hope you got the grades you wanted xx

    ReplyDelete
  3. Yay, so glad I found this! Now I can check my revision notes alongside something reliable! Thanks very much! :)

    ReplyDelete
    Replies
    1. I'm glad you found this helpful :)

      Delete
  4. Thanks this entire blog has helped so much please make more !!

    ReplyDelete
  5. This comment has been removed by the author.

    ReplyDelete
  6. THIS IS AMAZING! THANK YOU SO MUCH!

    ReplyDelete
  7. This comment has been removed by the author.

    ReplyDelete
  8. This comment has been removed by the author.

    ReplyDelete
  9. WOW!! thank you so much, this was beyond helpful!!!!

    ReplyDelete
  10. Hanna You are the lifeline of every kid doing their GCSEs.

    ReplyDelete
  11. This comment has been removed by the author.

    ReplyDelete
  12. hannahs a class A pocketnonce

    ReplyDelete
  13. GCCSSSEEEESS UR HAVING A LAUGH HEMEL HEMSTEAD UR HAVING A LAUGH

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

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

    ReplyDelete
  15. This comment has been removed by the author.

    ReplyDelete
  16. Find more at:

    http://igcse-biology-notes.blogspot.hk/2017/06/21-describe-levels-of-organisation.html

    ReplyDelete