How is our immune system like a castle?

Bodiam castle by PhillipC on flickr

Which part of our immune system represents the castle walls?  The small openings or windows?  The moat? The archers in case people get in? 

We’ll begin by talking about our first line of defence – the skin and mucous membranes.  We’ll take a look at their structure and explain how they work to prevent pathogens from entering the body.

These video clips are excellent in explaining how our skin has evolved. Evolve 1Evolve 2.  Evolve 3.

Tags: , ,

Leave a Reply