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The thick, muscular part of an earthworm's gut that grinds soil, releasing and breaking up organic matter
An infolding of the intestinal wall that increases the surface area available for digestion
A muscular blood vessel that links the blood vessels from the dorsal and ventral parts of an animal's body
Swollen area of an earthworm's body that secretes a film a mucus and functions in reproduction
A flexible, toungelike strip of tissue covered with tough, abrasive teeth that point backwards; main feeding adaption of mollusks
A mollusk that has a well-developed head and flattened foot, such as a snail, slug, or conch
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