Mollusks

MollusksCharacteristics of Mullosks

Definition Body Structure Circulatory System Obtain food Obtain Oxygen Movement Reproduction Adaptations

MollusksCharacteristics of M0llusks


An invertebrate with a soft, unsegmented body; most are protected by a hard outer shell.


Definition Three Groups Body Structure Circulatory System Obtain food Obtain Oxygen Movement Reproduction Adaptations

gastropod

A mollusk with a single shell or no shell.

Ex. Snails, Slugs



bivalve

A mollusk that has two shells held together by hinges and strong muscles.

Ex. Clams, Scallops



cephalopod

An ocean-dwelling mollusk whose foot is adapted as tentacles that surround its mouth.

Ex. Octopus, Squid



Bilateral Symetry

Two Openings, One Way Digestive System


Definition Body Structure Circulatory System

GastropodsBivalves

Obtain food Obtain Oxygen Movement Reproduction Adaptations

Open Circulatory System

A circulatory system in which the heart pumps blood into open spaces in the body and blood is not confined to blood vessels.


Definition Body Structure Circulatory System

Cephalopods Obtain food Obtain Oxygen Movement Reproduction Adaptations

Closed Circulatory System

A circulatory system in which the heart pumps blood through blood vessels.


Definition Body Structure Circulatory System Obtain food

Gastropods Obtain Oxygen Movement Reproduction Adaptations

Radula

A flexible ribbon of tiny teeth in mollusks.



Bivalves Obtain Oxygen Movement Reproduction Adaptations

Filter feedFood particles stick to mucus, then moved to mouth by cilia

http://www.youtube.com/watch?v=vNqEQjGaDVk

http://www.youtube.com/watch?v=VTuBbuUro4g&NR=1








Cephalopods Obtain Oxygen Movement Reproduction Adaptations

Captures food with tentacles and uses beak and radula to break down food



Gill

An organ that removes oxygen from water.


Definition Body Structure Circulatory System Obtain food Obtain Oxygen Movement

Gastropods Reproduction Adaptations

Move slowly on mucus secreting foot



Bivalves Reproduction Adaptations

Uses foot to dig and jump

Moves shells to create a jet type propulsion



Cephalopods Reproduction Adaptations

Jet propulsion

http://www.youtube.com/watch?v=5o-OMa53F1s&feature=related


Definition Body Structure Circulatory System Obtain food Obtain Oxygen Movement Reproduction

Gastropods Adaptations

Internal and sometimes external sexual reproduction

Male and Female; sometimes Hermaphrodites



Bivalves Adaptations

External sexual reproduction

Male and Female; sometimes Hermaphrodites



Cephalopods Adaptations

Internal sexual reproduction

Male and Female



What are some adaptations that mollusks have for carrying out their life functions?

Mollusks

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