00:01
Today we're going to be answering a question in regards to the chapter on the animals.
00:06
And they brought up, say, nidarians are organized at a tissue levels because they contain what? do they contain ectoderm and endoderm or just ectoderm or ectoderm and mezzoderm and mesoderm or endoderm or endoderm or just ectoderm and mesoderm or endoderm or endoderm.
00:30
And mesoderm, a mesoderm, just by itself.
00:36
You can pause the video and choose which one you believe is the correct answer, and we'll go over it shortly.
00:44
Okay, if you made your decision, looking into what they brought up saying with nidarians, they are an ancient group of invertebrates with a rich fossil record, and they brought up all the intricate and interesting things about nidarians and all that stuff, how they most, most them live in the sea, but there's some that live in fresh waters and other interesting stuff.
01:17
But they brought up during the development on nidarians, they have two germ layers.
01:26
And with the germ layers, they're like, what is that exactly? well, with germ layers, germ layers, they are basically any of the three or two primary cell levels formed in the earliest stages of the embryotic development.
01:58
The filament, and they usually consist of three germ layers, consisting of an endoderm, which is your inner layer, an ectoderm, which is your outer layer, and your mesoderm, which is your middle layer...