BIO 2129 Final: Final_Exam_-_Mollusca.doc
1 Dec 2014
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Document Summary
The scrapings are trapped in mucus and pass through the mouth to a stomach where digestion starts. In many molluscs a crystalline style (a rodlike structure in some mollusc stomachs made of enzymatic proteins required for digestion. Radula: the radula gave molluscs a way of feeding completely different from how any other animal fed. While all this was going on, predatory cnidarians were feeding on other animals in the zooplankton. They"re replaced by new teeth added at the back of the radula, which as it grows, moves forward on the surface of the odontophore. Ctenida: mollusc gills are called ctenidia and when the cilia that cover them beat, water is pulled into the mantle cavity, across the surface of the ctenidia, and out the cavity. The ctenidia are hollow and the spaces inside of them are part of the hemocoel. It consists of the fleshy part of the mollusc and contains the main organ systems of the mollusc. ).
