Lab_11_Mollusca - Phylum Mollusca Introduction Lab 11...

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Procedure Lab 11 Mollusk are animals with soft bodies. They are Coelomates , Protostomes, Bilaterlly symmetrical, Eukaryotes, Invertebrates and Eumetazoans. The members of Phylum Mollusca all have a muscular foot, visceral mass, mantle and maybe a shell. The foot of the animal is used for capturing prey, stabilizing the animal to a surface and for locomotion. The visceral mass contains the internal organs. The mantle is the covering over the visceral mass which protects the internal organs and secretes the shell. The shell is the hard calcium carbonate structure which protects the internal structures as well as serving as a retreat for some animals. Examples of Mollusk are clams, squid, snails, chitons and octopus. There are seven classes of Mollusk. Class Aplacophora, members are small worm like animals with calcareous spicules. Members of Class Polyplacophora are chitons. Chitons have eight shell plates. Soft body animals with coiled shells are members of Class Gastropoda . Animals in Class Cephalopoda possess what is called a head foot. Their foot has been adapted to form a siphon which is located on the head of the animal. An internal or reduced shell may be present in Cephalopods. Some cephalopods may
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This note was uploaded on 05/25/2011 for the course BIOLOGY 1011 taught by Professor Thornton/webster during the Spring '11 term at Florida A&M.

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Lab_11_Mollusca - Phylum Mollusca Introduction Lab 11...

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