Saliva! Remember, gobbing in the street can lead to tuberculosis so don’t do it.
Part Seven: ?
Back to GCSE Biology. Fill in the missing words:
Scanning electron micrograph of two _____ _____. The individual _____ sit within their myelin sheaths (green) and are packed with energy producing mitochondria. The myelin provides a layer of electrical insulation made up of lipids and proteins produced by the Schwann cells.
Can you guess what it is yet?
Milne Harris, Wellcome Images
Image credit: Dr David Furness, Wellcome Images
Copyrighted work available under Creative Commons by-nc-nd 2.0 UK: England & Wales, see http://images.wellcome.ac.uk/indexplus/page/Prices.html