BIO 2135 Lecture Notes - Lecture 12: Bioluminescence, Ovotestis, Hemolymph
13 Oct 2017
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Document Summary
Bottom cilia beating keeps organism properly oriented so it isn"t tipping in the water. Pericardial cavity- heart sits inside it"s own cavity. Add veliger larva (slide 32) as an autapomprphy. Dorsal mantle: covering of epithelium on dorsal side. Tetra nerve system: two paired nerve cords, one supplying muscular foot, one supplying viscera. Snail retracting in shells was a huge innovation because it protects them from drying out hence they are the only group who moved up on land. Feeds on cnidarians and lines their outer covering with their cnydocytes. Can learn, have a language that they use to communicate w each other ( ashes colours/ lights) Hinges in their shell so they can bend to hold on tight to substrate. Scallop (closely related to the clams and muscles) Has returned to being an active swimmer ( by opening and closing its shell quickly ) Has little tiny eyes on the mantle to see where it"s swimming.
