00:01
Reptiles are the earliest vertebrates to be fully adapted to life on land.
00:06
So if you think about what they would need to be on land, the one difference between being in the water is obviously you need to maintain your water inside your body and you need to figure out a way to maintain some temperature regulations on your body.
00:21
Well, reptiles are not endothermating, they do not produce their own body heat.
00:27
Instead, for their way of thermositions, is that they're ectothermic.
00:32
So they're going to gather heat from conduction by laying on a rock, from the sun to solar radiation, can give them some heat and some convection.
00:43
Well, more breeze is going by them.
00:45
They can get some heat that way.
00:48
So convection, conduction, or radiation are going to be their three ways of gathering heat inside their body.
00:55
But it all comes from an outside source of heat.
00:58
So they are ecto.
01:02
As opposed to endothermic, which is what mammals and birds are when they, when their primary stores of heat, it's inside their body.
01:12
One major way that reptiles are going to maintain that all put water inside their body is that their epidermis, their skin on the outside, has much keratin inside of it...