Ellura Sanctuary, Swan Reach, SA, 5354
    
about COLD BLOODED ANIMALS
Reptile Temperature Control
Eastern Bearded Dragon
Retired Professor of Anatomy, Ian Gibbins, has kindly shared his thoughts with us to help people learn:

They are able to redistribute their blood to the skin that's against the rock surface if that is warmer than the air to maximise heat uptake. They do this by constricting the vessels to the skin on the back and dilating the ones on their belly using nerves that are equivalent to, and work the same way, the ones we use control blood flow to our skin (one of the many things we used to work on... ).
As I recall their preferred body temperature = blood temperature is in the mid 30s = not much different to ours.

Ian Gibbins
Reptile Tongues
Shingleback
Retired Professor of Anatomy, Ian Gibbins, has kindly shared his thoughts with us to help people learn:

Goannas use their tongue tips to sample their chemical environment (air, substrate, etc). The tongue tips take the sample to small organs on the roof of the mouth where they are "tasted". Snakes do something similar. We do too in strange sort of way. Most of what we "taste", we actually smell, with the chewing / mashing of food by our teeth and tongue releasing volatile chemicals that reach the upper part of our nose via the back of our throat. This part of the nose is probably evolutionary related to the same structures that the goanna use.

Ian Gibbins
 
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