Gastropods, Bivalves, Cephalopods

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Presentation transcript:

Gastropods, Bivalves, Cephalopods Mollusks Gastropods, Bivalves, Cephalopods

Gastropods-Largest Group Bivalves-2 Shells Examples: Snails and Slugs Bivalves-2 Shells Examples-Clams, Mussels, Scallops, etc. Cephalopods- Octopus and Squid Octopus-Most Intelligent Giant Squid-Largest Invertebrate

Symmetry: ______ Body Plan: Soft body protected by shell Mantle-Soft outer tissue Coelomate-Fluid Filled Body Cavity

Feeding: Some are filter feeders (bivalves) Herbivores (snails) Carnivores-Octopus and Squid Radula The radula is an anatomical structure that is used by mollusks for feeding, sometimes compared rather inaccurately to a tongue. It is a minutely toothed, ribbon, which is typically used for scraping or cutting food before the food enters the esophagus.

Respiration/Circulation/Excretion Most have an open circulatory system Visceral Mass contains internal organs Cephalopods-Closed Circulatory System What is the difference between an open and closed circulatory system?

Response Help Monitor environmental conditions Camouflage Aggressive behavior Ink

Movement Burrow Slide Sessile Muscular Foot

Reproduction All sexual reproduction Video