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phylum - Coggle Diagram
phylum
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Arthropoda
characteristic:
Exoskeleton, Outside the body, Very good protection,Does not grow, so it must be shed periodically(molting
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Invertebrates
Specialized cells, tissues and organs
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Cnidaria
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two body forms: polyp- sessile, tentacles up medusa- free swimming, tentacles down
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Mollusca
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gastropods
Univales: one shel, breathe with lungs: example snail
Bivals: two shells, breathe with gills : example: clam
cephalopods
Foot is modified into tentacles, breathe with gills: examples : octopus, squid
Sexual reproduction: most have separate sexes, some are hermaphrodites
Most have an open circulatory system (blood is contained within vessels that empty into sinus cavities
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