Pence's #9 Biology Vocabulary Word Fed. 01, 2009

17 terms by Pence 

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Invertebrate

Organisms that lack a backbone

Arthropods

Invertebrates with jointed appendages

Exoskeleton

External skeleton

Chitin

A substance that is chemically similar to cellulose or starch

Entomologists

Scientists who study insects

Metamorphosis

A profound change in form from one stage to the next in the life history of an organsim, as from the caterpiller to the pupa and from the pupa to the adult butterfly

Nymph

The immature form of these insects that do not pass through a pupal stage. Nymphs usually resemble the adults, but are similar, lack fully developed wings, and are sexually immature

Compound Eye

An arthropods eye is subdivided into many individual, light receptive elements, each including a leens, a transmitting apparatus, and retinal cells

Cephalothorax

The anterior part of the body in certain arachnids and crustaceans, consisting of the coalesced head and thorax

Chelicerae

Either of the first pair of fanglike appandages near the mouth of an arachnid, such as a spider, often modified for grasping and piercing

Pedipalp

One of the second pair of appendages near the mouth of a spider or other arachnid that are modified for various reproductive, predatory, or sensory functions

Book Lungs

A saccular respiratory organ found in some arachnids, such as scorpions and spiders, consisting of several parallel membranous folds arranged like the pages in a book

Spinnerets

One of the small opeenings in the back part of a spider or silk-producing insect larva, through which the sticky fluid that dries into silk is released

Carapace

A bony or chitinous shield, test, or shell covering some or all of the dorsal parts of an animal as of a turtle

Maxillipeds

One of the three pairs of crustaceans head appendages located just posterior to the maxillae and used in feeding

Swimmerets

One of the paired abdomial appendages of certain aquatic crustaceans, such as shrimp, lobsters, and isopods, that functions primarily for carrying the eggs in females and are usually adapted for swimming. Also called pleopod

Green Glands

One of the pair of excretory organs in each side of the head region of decapod crustaceans, emptying at the base of the antennae

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