How can we help?

You can also find more resources in our Help Center.

22 terms

Arthropods and Echinoderms

STUDY
PLAY
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