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How do you tell an alien how we carry
out gas exchange?

Well we have nothing in common but it doesn't matter, I'll explain the major
difference which is gas exchange.

First we have the nasal cavity but but you won't understand as you don't have
it, but it's the…

Page 2

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The diaphram muscle which lies underneath the pair of lungs contracts and
flattens also moves down when we inspire. When we expire the diaphram
muscle relaxes, moves upwards and becomes dome-shaped like the Taj Mahal
I showed you a few months ago it was a very relaxing view.

The volume…


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