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

24 comments:

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

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

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

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

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  6. THIS IS AMAZING! THANK YOU SO MUCH!

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

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

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  12. hannahs a class A pocketnonce

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

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

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

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  16. Find more at:

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

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  17. still saving GCSE students in 2019 hannah
    all the way from 2013
    great work
    helped me so much

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