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I'one thousand so excited affiliate 33 and 34 my favorite chapters okay, so chapter 33 is broken up into ii pieces because it's a huge chapter and what we're going to exist doing at this signal is getting into all the different phyla and classes that are out in that location and there are a lot I'g not going to lie to you then what we're going to exercise is start with the least advanced organisms and then movement up to the almost advanced organisms and that's kind of how we're going to become so what we're going to commencement out with are what are chosen non cm8 invertebrates then let'southward call back nearly what that ways not-silk mate is a cielo mates right and then they don't have a body cavity, and they are going to be invertebrates meaning they don't have a spinal column well yeah okay and so allow's talk near sponges that's going to be the start phylum that we're going to look at, so sponges are going to be phylum Porifera and the name Horn ways with holes and that makes sense because sponges have holes and and so this is going to be a pretty big phylum over 5,000 species almost of them are going to be in marine environments there's a few that are freshwater these are going to be sessile and what I mean by sessile is that they're going to exist stuck to the ground right or the substrate that they're growing in so if we take a look at this right here this is a moving picture of a sponge right here and not a lot of symmetry right it's not exactly symmetrical and that's why it's in the grouping para Zola instead of yous metazoans correct sponges can get to be very big then here are some sponges right here these are sponges right here this is sponges right hither these are all coral, but anyway sponges can get to be very huge in that location's a type of sponge called a butt sponge that I've been completely inside because long story I was hiding from a shark but anyway and then they tin become to exist very big they can exist very small, but they're very sensitive to the surround and if you lot betrayal them to air a lot of sponges will actually die afterward that they'll go septic, so information technology's not a good thing now permit'southward look at their actual shapes i thing that yous may discover with these and these here and in this previous one is that they all kind of have a face similar shape with that big pigsty at the top, so that hole at the acme is called the occur um and that's going to be where particles are going to catamenia out of they're going to pull water in through the sides, and then it's going to come out through the height so same here water volition go in through the sides so out through the pinnacle here so let's look at a diagram of the way that they expect so here's our occur rimmed at big hole at the top and recollect I talked about those Co Ana sites look at that how similar that looks, so that'southward why some scientists say that peradventure this was a bunch of these guys that concluded up living together they used to be protists, and now they're going to exist these Co n O sites inside a sponge who knows, so the sponge is going to be very very very bones it's going to accept three layers, so you've got...
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