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Chapter 34
Coelomate Invertebrates
13
Biology
Undergraduate 1
01/21/2008

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Term
Hermaphroditic
Definition
Possessing both male and female parts.
Term
Radula
Definition
Rasping tongue found in most mollusks
Term
Mother of Pearl
Definition
Nacre; An organic-inorganic composite material produced by some mollusks
Term
Trochophore Larva
Definition
A specialized type of free-living larva found in lophotrochozoans
Term
Mantle
Definition
The soft, outermost layer of the body wall in mollusks; the mantle secretes the shell.
Term
Setae
Definition
In an annelid, bristles of chitin that help anchor the worm during locomotion, or when it is in its burrow.
Term
Clitellum
Definition
The reproductive part of a worm that produces cocoons.
Term
Exoskeleton
Definition
An internal skeleton, as in arthropods.
Term
Ecdysis
Definition
Shedding of outer, cuticular layer; molting, as in insects or crustaceans
Term
Tracheae
Definition
A tube for breathing; in insects and some other terrestrial arthropods, a system of chitin-lined air ducts
Term
Malpighian Tubes
Definition
Blind tubules opening in to the hindgut of terrestrial arthropods; funcion as excretory organs
Term
Nauplius
Definition
A larval form characteristic of crustaceans
Term
Metamorphosis
Definition
A biological process by which an animal physically develops after birth or hatching, involving a conspicuous and relatively abrupt change
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