Bites: Spider Wasp Venom:
Zebra Spider Wasp
Cold-Blooded: Reptile Tongues:
Reptile Temperature Control:
Eastern Bearded Dragon (Pogona barbata)
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.