How do lizards regulate their body temperature in the heat?

Answer 1

"Lizards and other reptiles, such as snakes, turtles, and alligators, are coldblooded.
Cold-blooded animals do not have a constant body temperature;
instead their body temperature changes as the temperature of the surrounding
environment changes. As body temperature decreases, both breathing and the
pumping of blood by the heart slow down"
http://www.nc4h.org/teachers/enrichment/wildlife/9-12-lizards.pdf

"reptiles are ectothermic animals, which means their metabolism does not generate enough heat byproducts to maintain body temperature above air or surface temperatures. Unlike warm-blooded mammals (including humans), reptiles regulate their body temperatures by behavior, such as basking in the sun or moving between warm and cold spots."
http://www.petplace.com/reptiles/understanding-the-cold-blooded-creature/page1.aspx

Hope these links help.

Answer 2

This Site Might Help You.

RE:
How do lizards regulate their body temperature in the heat?

Answer 3

In addition I have watched lizards doing push ups to change the air flow under their body. They move around on rocks on cold mornings getting heat from the sun above and the rocks below. In the desert they will bury themselves in the sand when it becomes too hot to get out of the sun. In the forest they will go into the shade of plants or rocks.

Spend some time in the outdoors, they are fun to watch.

Answer 4

Sorry I don't know much about snakes even though my son had a grass snake for years. I would hazard a guess though that we (as Humans) have sweat glands.That is what regulates our body temperatures. Hope I've helped somewhat.