Arthropods and Echinoderms

22 terms by karbe17

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arthropod

invertebrates that have an external skeleton, a segmented body, and jointed attachments called appendages

exoskeleton

a waxy, waterproof outer shell or outer skeleton that protects the animal and helps prevent evaporation of water

molting

the process of shedding an outgrown exoskeleton

antenna

an appendage attached to the head that contains sense organs

crustacean

an arthropod that has two or three body sections, five or more pairs of legs, and two pairs of antennae

metamorphosis

a process in which an animal's body undergoes dramatic changes in form during its life cycle

arachnid

arthropods with two body sections, four pairs of legs, and no antennae

abdomen

the hind section of an arthropod's body that contains its reproductive organs and part of its digestive tract

appendages

jointed attachments

segmented

in segments

jointed

parts that help move

insect

arthropods with three body sections, six legs, one pair of antennae, and usually one or two pairs of wings

thorax

an insect's midsection, to which its wings and legs are attached

pupa

the third stage of complete metamorphosis, in which an insect changes from a larva to an adult

complete metamorphosis

a type of metamorphosis characterized by four dramatically different stages

nymph

a stage of gradual metamorphosis that usually resembles the adult insect

gradual metamorphosis

a type of metamorphosis in which an egg hatches into a nymph that resembles an adult, and which has no distinct larval stage

food chain

a series of events in which one organism eats another and obtains energy

ecology

the study of food chains and other ways that organism interacts with their environment

pollinator

an animal that carries pollen among plants

pesticide

a chemical that kills pests

biological control

a natural predator or disease released into an area to fight a harmful insect

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