BIOL 2P92 Lecture 1: February 9, 2017
22 Mar 2017
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Document Summary
Visceral mass is coiled into the shell which gives them more room to compress in. Terrestrial and freshwater forms are mostly pulmonate. Mantle cavity is adapted as a lung. Pneumostome is a breathing pore a respiratory opening of the external body anatomy of an air-breathing land slug or land snail. Slime of a snail is a liquid crystal traps bacteria. Slime gives them a way to slow down their prey. Each species has its own specialized venom. Venom used for neuro dissection and therapies in labs (medicine) Elysia chlorotica: photosynthetic functionality: codium provides more energy to host snails than cladophora. Same internal anatomy as chitons and gastropods arranged differently: foot, mantle, visceral mass is suspended from the dorsal mid-line, has a circulatory system (heart with ventricles), siphons leading through the gills (respiratory and filter feeding) Shipworms use their anterior valves as rasps to drill through wood: uses its shell as a drill sharp edges.
