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Other. Invertebrates. Characteristics of the Mollusks. Mantle Shell Visceral hump Foot Radula. Phylum Mollusca. Clams, oysters, mussels, scallops Snails, slugs Squid, octopus. Classes of Mollusks. Bivalvia Gastropoda Cephalopoda. Phylum Mollusca Class Bivalva. “Two-shelled”

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  1. Other Invertebrates

  2. Characteristics of the Mollusks • Mantle • Shell • Visceral hump • Foot • Radula

  3. Phylum Mollusca • Clams, oysters, mussels, scallops • Snails, slugs • Squid, octopus

  4. Classes of Mollusks • Bivalvia • Gastropoda • Cephalopoda

  5. Phylum MolluscaClass Bivalva • “Two-shelled” • Clams, oysters, mussels, scallops

  6. Class Bivalva • Filter feeders • Incurrent & excurrent siphons • Mucus feeders

  7. Class Bivalva • Respiration: gills • Circulation: open system • Excretion: kidney

  8. Class Bivalva • Response: ganglia & nerves • Reproduction: sexual with a larval stage

  9. Phylum MolluscaClass Gastropoda • “Stomach-footed” • Snails, slugs

  10. Phylum MolluscaClass Cephalopoda • “Head-footed” • Squid, octopus

  11. Chambered Nautilus • Shell made of many once-occupied chambers

  12. Phylum Echinodermata

  13. Echinodermata • “Spiny-skin” • Starfish, sea urchins, sand dollars • Water-vascular system • Regeneration

  14. Echinodermata • Movement • Water-vascular system • Tube feet

  15. Echinodermata • Nutrition • Starfish LOVE clams! • External digestion

  16. Echinodermata • Response • Nerve ring • Radial nerve in each ray

  17. Echinodermata • Reproduction • Sexual with separate sexes • Regeneration

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