If we looked at our skin through a microscope we would see tiny crannies and crevices. Inside these tiny crevices, millions of bacteria are living and growing, doubling their population every twenty minutes. It is a short and dangerous life for bacteria as the surface of the skin they live on is continually eroding. We shed skin all the time and with it we lose 25,000 bacteria a minute. Most of the dust in the home is actually flakes of skin complete with bacteria.

This clip is from:
Science Clips, Micro Organisms
First broadcast:
11 October 2007

Useful for an initial discussion about bacteria on the skin which could lead to reasons why and how we could limit the bacteria present, particularly on our hands. The clip could be used as part of an activity where children under supervision could put their fingerprints onto some agar jelly and watch bacteria grow. This could be linked to a PSHE lesson where children make posters to encourage their peers to wash their hands properly.