GCSE Biology Revision "Surface Area to Volume Ratio"

Learn smarter with PLUS. Try for free: https://www.freesciencelessons.co.uk/modules/gcse-biology-1-triple/ If you're a teacher and would like PLUS for your school, then email [email protected] In this video, we explore what is meant by the surface area to volume ratio of an organism. We then look at how to calculate the surface area to volume ratio. We then explore how gills are used by fish to increase the absorption of oxygen into the bloodstream. This video is based on the AQA spec. This video may be appropriate for iGCSE / O Level Biology. Please consult your specification. The Amazon link above is an affiliate link. This provides a small commission which helps to support freesciencelessons. The cost remains the same to you. If you prefer not to use this, you can search Amazon for the Freesciencelessons workbooks. Image credits: Amoeba By dr.Tsukii Yuuji - http://protist.i.hosei.ac.jp/PDB2/PCD1761/D/79.jpg, CC BY-SA 2.5, https://commons.wikimedia.org/w/index.php?curid=7780521 Fish Public Domain, https://commons.wikimedia.org/w/index.php?curid=672084 Gills By User:Uwe Gille - Own work, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=1184299 Kitten https://commons.wikimedia.org/wiki/File:Black_kitten_July_August_2009-1.jpg Alvesgaspar, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons Cheek cells https://commons.wikimedia.org/wiki/File:Cheekcells_stained.jpg Mulletsrokk, CC BY-SA 3.0 https://creativecommons.org/licenses/by-sa/3.0, via Wikimedia Commons