BIOL 1010 Lecture Notes - Lecture 47: Mollusca, Body Plan, Land Snail
14 May 2017
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Section 20. 9 diverse molluscs are variations on a common body plan. Phyla mollusca have mollusc snails, slugs, oysters, clams, octopi, Figure 20. 9a ----------------------------------------: basic body plan of a. Mollusc with 3 main parts: foot, visceral mass, & mantle: a muscular foot. Is a fold of tissue draping over the visceral mass & secretes a shell in molluscs such as clams & snails. The mantle extends beyond the visceral mass, producing a water-filled chamber called the mantle cavity which houses the gills. In a snail, the radula extends from mouth & slides back & forth, scraping & scooping algae off rocks. Molluscs have separate sexes, with reproductive organs located in the. The life cycle of many marine molluscs includes a ciliated larva called a. Trochophore characteristic relationships among the invertebrate phyla. larvae significant in determining phylogenetic are a. Basic body features above have evolved different ways & in different groups of molluscs. in.
