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23 terms

Modern Biology Chapter 35

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seta
External bristles found in most annelids; aid in movement
parapodia
fleshy protrusions found in polychaetes that aid in locomotion and feeding
crop
Temporary storage area found in earthworms
gizzard
The thick, muscular part of an earthworm's gut that grinds soil, releasing and breaking up organic matter
typslosole
An infolding of the intestinal wall that increases the surface area available for digestion
aortic arch
A muscular blood vessel that links the blood vessels from the dorsal and ventral parts of an animal's body
nephridium
Excretory tubule that eliminates cellular wastes and excess water in an earthworm
clitellum
Swollen area of an earthworm's body that secretes a film a mucus and functions in reproduction
seminal receptacle
Reproductive structure that secretes sperm in an earthworm
trochopore
Larval stage of development found in most aquatic mollusks and annelids
visceral mass
The central region of a molluck's body that contains some internal organs
mantle
Layer of epidermis covering the visceral mass that secretes the shell
mantle cavity
The space between the mantle and visceral mass that protects the gills of mollusks
ganglion
Group of nerve cell bodies in different areas
radula
A flexible, toungelike strip of tissue covered with tough, abrasive teeth that point backwards; main feeding adaption of mollusks
gastropod
A mollusk that has a well-developed head and flattened foot, such as a snail, slug, or conch
hemolymph
Circulatory fluid of a gastropod's circulatory system
hemocoel
Body cavity of a gastropod
bivalve
A mollusk with a shell that is divided into two halves (valves) connected by a hinge
incurrent siphon
Tube found in bivalves through which water enters the body
excurrent siphon
Tube through which water exits that mantel cavity of a bivalve
cephalopod
Marine mollusks that are specialized for a free-swimming, predatory existence
mollusk
an invertebrate with a soft unsegmented body often enclosed in a hard shell containing calcium carbonate