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Published byProsper Perkins Modified over 8 years ago
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Mollusks Emily Yau and Bridget Waas
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Mollusks are tripoblastic: they have three germ layers Endoderm, ectoderm, and mesoderm Germ Layers
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Most of mollusks are bilaterally symmetrical Symmetry
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Mollusks are coelomates, and have a true coelom Most coeloms are small and located around the heart, gonads, and metanephridia (organ similar to the kidneys) Coelom
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All mollusks have a complete digestive tract Mouth, stomach, and anus Tube-like Digestive Tract
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Evidence of cephalization increases from chitons to cephalopods Cephalization
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None! Segmentation
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Most mollusks have a hydrostatic skeleton or an exoskeleton The number of appendages change from species to species Skeleton and Appendages
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A mollusk’s circulatory system is mainly open No true heart or capillaries Circulatory System
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Most mollusks have one gill or one pair of gills Some land mollusks have lungs Respiratory System
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Assexual or sexual, depending on the species Reproduction
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Mollusks are found everywhere, but most live in marine environments Habitat
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