none it was a dino stupid people
There's a misconception at work here. The reptilian branch of evolution did not spawn the mammalian branch of evolution. You need to go back to the reptilian ancestor that was also a mammalian ancestor. We humans do have what is referred to as a reptilian brain, which is a small part of our whole brain.
A mammal's brain is about 15 times heavier than the brain of a similarly sized fish, amphibian, or reptile.
the lungs
Dolphins have a mammalian respiratory system, ie. lungs.
smaller
lungs are vertical to the spine
Yes, bearded dragons have red blood cells. Reptilian red blood cells are different to mammalian red blood cells in that they have a nucleus and are oval in shape.
Lungs do not differ that much in domestic animals. These animals need oxygen just like the animals that are in the wild.
Amphibious
The blood leaving the lungs is loaded with oxygen, while blood entering the lungs is about to get oxygen from the respiratory system.
Mammalian brains evolved from reptilian brains (simply instinctive), develop feelings and can alter instincts through experience.