Invertebrates slideshow wiki2
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Transcript of Invertebrates slideshow wiki2
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INVERTEBRATES
Samantha Luangkhot
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Invertebrates
An invertebrate is an animal without a backbone. Invertebrates make 95% of all animal species.
Types of invertebrates: Porifera Cnidaria Platyhelminthes Mollusca Annelids Echinodermata Arthropoda
Invertebrates usually reproduce sexually or asexually.
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Continued…
Invertebrates are heterotrophs: feeding off other organisms for nutrition.
Their cells lacks rigid cell walls.
Invertebrates are multicellular: cells that undergoes different functions.
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Examples…
Porifera: lacks tissues, sponges; Cnidaria: “stinging creatures” jellyfishes,
hydroids, Platyhelminthes: no body cavity,
parasites; worms. Mollusca: soft body protected by a hard
shell of calcium carbonate; octopus. Arthropoda: hard exoskeleton, open
circulatory system; lobster, spiders.
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Examples
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Citations
https://sites.google.com/a/mrswan.net/wiki/student-pages/nanci-rivera/ch-33-invertebrates
http://en.wikipedia.org/wiki/Invertebrate http://www.oum.ox.ac.uk/thezone/fossils/
inverts/index.htm