Vocabulary Vocabulary ReviewReview

Ch 36 – Ch 36 –

ArthropodsArthropods

A member of the phylum Arthropoda,

which includes invertebrate animals

such as insects, crustaceans, and

arachnids; characterized by

having segmented bodies and paired

appendagesArthropod

A structure that extends from the main body, such

as a limb, tentacle, fin, or wing

Appendage

A carbohydrate that forms part of the exoskeleton of arthropods and

other organisms, such as insects,

crustaceans, fungi, and some algae

Chitin

An eye composed of many light

detectors separated by pigment cells

Compound eye

The shedding of an exoskeleton, skin, feathers, or hair to

be replaced by new parts

Molting

A member of the class Trilobita; an extinct

type of arthropod that is characterized by

many body segments each of which had one

pair of appendages

Trilobite

In arthropods, a structure that is

composed of several fused body segments and that is typically

specialized for a specific function (plural, tagmata)

Tagma

In some arthropods, a

jawlike mouthpart used to pierce and

suck food

Mandible

In some arthropods, either of a pair of pincer-like appendages used to attack

prey

Chelicera

The free-swimming larva of most crustaceans

Nauplius

In arthropods, one of several long,

curved, hair-shaped

appendages (plural, cirri)

Cirrus

A crustacean that has seven pairs of identical legs and

no carapace; examples include sowbugs and pill

bugsIsopod

A crustacean that has five pairs of legs; examples include shrimp,

crabs, and lobsters

Decapod

In arachnids and some crustaceans,

the body part made up of the head and the

thorax

Cephalothorax

In arthropods, the mid-body region

Thorax

A shield-like plate the covers the

cephalothorax of some crustaceans

and reptiles

Carapace

In arthropods, the posterior tagma

Abdomen

A feeler that is on the head of an

invertebrate, such as a crustacean or an

insect, and that senses touch, taste, or smell

Antenna

In crustaceans, a second pair of

antennae, usually smaller than the

first

Antennule

In arthropods, one of the pair of

appendages that have claws

Cheliped

In some crustaceans, an

abdominal appendage

modified to allow movement,

respiration, or the carrying of eggsSwimmeret

The unpaired, terminal

abdominal segment of crustaceans

Telson

A flattened posterior

appendage in some crustaceans

Uropod

Any gland that secretes a

substance to help transform food into substances

that the body can use

Digestive gland

An excretory organ of some

crustaceans that is located at the

base of the antennae

Green gland

An arthropod that has eight legs and

no wings or antennae; a

spider, scorpion, mite, or tick

Arachnid

One of the second pair of appendages that are beside the

mouth of an arachnid and that

are used for chewing and handling prey

Pedipalp

An organ that spiders and

certain insect larvae use to produce silky

threads for webs and cocoons

Spinneret

In spiders and scorpions, an

organ for respiration that

has parallel folds that resemble the pages of a book

Book lung

In insects, myriapods, and spiders, one of a

network of air tubes

Trachea

An external opening in an

insect or arthropod, used in

respiration

Spiracle

An excretory tube that opens into the back part of the intestine of

most insects and certain arthropods

Malpighian tubule