00:01
A diploblast has two tissue layers, the ectoderm and the mesoderm.
00:06
Is this false or is it true? okay, so it's true that a diploblast only has two tissue layers, because organisms can either be diploblasts or triploblasts.
00:18
And triploblasts make most of the animals, like us, and triploblasts have three germ layers.
00:25
They have the ectoderm, vermisoderm, and the endoderm.
00:29
Diploblasts like nidaryans, only have two.
00:32
So what do they lose? and you can also have only a single germ layer, like sponges, but those aren't part of this question.
00:44
So the sponges with one, diploblasts, like naderia with two, and triploblasts with three...