10 - Starfish Dissection.docx.pdf - SeaStar Dissection BIOL1407 – Unit 3 External Anatomy(Dorsal side 1 Place your starfish in a dissection tray with

10 - Starfish Dissection.docx.pdf - SeaStar Dissection...

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SeaStar Dissection BIOL1407 – Unit 3 External Anatomy (Dorsal side) 1. Place your starfish in a dissection tray with the dorsal side facing up. If done correctly, the mouth of the starfish should be facing downwards. 2. There are lots of little spines scattered over the surface of the entire starfish. The spines are attached to the plates of the starfish skeleton that are just under the skin. These plates are called ossicles and make up the endoskeleton of the starfish. Right next to the spines are skin gills and small pincer-like pedicellarias . The skin gills are the respiratory structures of the starfish and the pedicellarias keep the skin gills free of debris. 3. In the center of the seastar is a small, warty area called a madreporite plate . It is circular and is where water will enter the vascular system. 4. On the tip of each arm is an eyespot that is used to detect light and a single tentacle that can detect touch and light amounts of pressure from the environment. In the space below, insert a picture of your sea star before it has been dissected and label the structures in bold from above. You may insert your labels digitally or print out this lab with your inserted pictures and draw your labels by hand.
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  • Fall '14
  • AshleyMcGee

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