Originally Posted by INFERNO
It's certainly quite............. as beneficial as possible, as well as within reason.
You mention reptiles and mention amphibian. What about fish? They have two chambers and only unoxygenated blood flows through it once per circulation.
It is supposed to be 3 chambers, but because(I forget where) Doesn't have cardiac muscle, so it is not 3 chambers.
Also, it is called something...I forget.
Then, the gradual change.
Is this thread about biology?