bio lab report18 - Sheldon Pope (with Allison, Lam and...

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Sheldon Pope (with Allison, Lam and Eric) Bio 412 Lab Section 18 4-3-08 Introduction: Mollusks are shelled creatures which have the ability to adapt to land and aquatic environments. Due to these abilities there is a great diversity in the mollusk family. A mollusk has protostomes with a reduced version of the true coelom. Mollusks have a basic body plan with an open circulatory system. The rest of their body includes visceral mass, a foot, and the mantle which usually secretes the animal’s shell. Annelids which are segmented worms get their name from the latin word annel which means a ring. The true coelom found inside a segmented worm is lined with mesoderm, which is a type of skin layer. The protostomes is the main feature of these organisms. Metamerism is the reason for the name of these worms, it means serial segmentation. Segmented worms have a hydrostatic skeleton and longitudinal muscles, both of these features help them move and squeeze through tight places. A normal skeleton would not work for worms, but a closed circulatory system does, which is why segmented worms have one.
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This lab report was uploaded on 04/18/2008 for the course BIOLOGY 41 taught by Professor Albaker during the Spring '08 term at New Hampshire.

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bio lab report18 - Sheldon Pope (with Allison, Lam and...

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