External bristles found in most annelids; aid in movement
fleshy protrusions found in polychaetes that aid in locomotion and feeding
Temporary storage area found in earthworms
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
Excretory tubule that eliminates cellular wastes and excess water in an earthworm
Swollen area of an earthworm's body that secretes a film a mucus and functions in reproduction
Reproductive structure that secretes sperm in an earthworm
Larval stage of development found in most aquatic mollusks and annelids
The central region of a molluck's body that contains some internal organs
Layer of epidermis covering the visceral mass that secretes the shell
The space between the mantle and visceral mass that protects the gills of mollusks
Group of nerve cell bodies in different areas
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
Circulatory fluid of a gastropod's circulatory system
Body cavity of a gastropod
A mollusk with a shell that is divided into two halves (valves) connected by a hinge
Tube found in bivalves through which water enters the body
Tube through which water exits that mantel cavity of a bivalve
Marine mollusks that are specialized for a free-swimming, predatory existence
an invertebrate with a soft unsegmented body often enclosed in a hard shell containing calcium carbonate
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