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Marine Science Final
Phylum Cnidaria | Cnidocytes-stinging cells used for protection |
Phylum Cnidaria | Radial symmetry Mesoglea- separate 2 tissue layers Gastrovascular Cavity-space in middle of body for digestion and reproduction |
Body Forms Phylum Cnidaria | Polyp- attached with tentacles up (ex. Sea anenome) Medusa- free floating with tentacles down (jellyfish) |
Phylum Arthropoda | Krill, lobster, crab, shrimp |
Phylum Arthropoda | Jointed appendages Segmented bodies Chitin exoskeleton Bilateral symmetry Crayfish use chelipeds to grasp food |
Phylum Arthropod Class Merostomata | Horseshoe crabs |
Phylum Cnidaria | Corals, anenomes, sea fans, jellyfish |
Phylum Arthropod Class Pycnogonida | Sea spiders |
Phylum Arthropoda Subphylum Crustacea | Barnacles, krill, crab, shrimp, lobster |
Phylum Echinodermata | Sea urchin, sea cucumber, sand dollar, brittle stars, sea stars, crinoids |
Phylum Echinodermata Characteristics | Radial symmetry Spiny skin Water vascular system Tube feet - used for movement and digestion |
Phylum Annelida | Polychaete worms Nephridia- water regulating tubes Segmentation Among most common marine organisms Found living in ocean depths, floating free near surface, or burrowing in mud and sand of beach |
Phylum Ctenophora | Comb jellies Not a member of Cnidaria Rows of cilia No cnidocytes- can't sting |
Phylum Mollusca | Mantle- muscular bad that surrounds visceral mass and secretes calcium carbonate she'll Muscular foot- movement |
Phylum Mollusca | Radula- tongue-like structure with scraping teeth for feeding Trochophore larvae- free swimming , with several bands of cilia |
Phylum Mollusca | Shell- encloses, supports, and protects the soft part of animal Cephalization (cephalopods)- head-foot |
Phylum Mollusca Class Gastropoda | Sea hares, snails, conchs, whelks, nudibranches (sea slug) |
Phylum Mollusfa Class Bivalvia | Oysters, clams, mussels, scallops Filter feeders, adductors hold 2 shells together |
Phylum Mollusca Class Cephalopoda | Squid, octopus, cuttlefish, nautilus Developed brain Most intelligent is thought to be the octopus |