Member of a group of invertebrates characterized by segmented bodies, jointed appendages, and exoskeletons.

Midsection of an arthropod.

Appendage with joints, or points where it can bend.

Hard external skeleton; characteristic of some invertebrates.

Polysaccharide in arthropod exoskeletons.

Process of shedding an old exoskeleton (in arthropods) or skin (in reptiles) and producing a new one.

Clusters of nerve cell bodies found along the nerve cords of some animals.

Eye with many facets, each with its own lens.

In some arthropods, chitin-lined air tube that forms part of the respiratory system.

Hole in an arthropod's exoskeleton that allows the exchange of carbon dioxide and oxygen.

Member of a group of arthropods that includes lobsters, crabs, crayfish, shrimp, and barnacles.

Member of a group of arthropods that includes spiders, scorpions, mites, and ticks.

Member of a group of arthropods that includes beetles, ants, butterflies, bees, and many others.

Fused head and thorax characteristic of arachnids and some crustaceans.

Fang-like mouthpart characteristic of arachnids.

Mouthpart characteristic of arachnids that is used to manipulate prey.

Excretory structure that works with the gut in reducing water loss in land arthropods.

Respiratory structure found in many arachnids.

Organ in a spider's abdomen that spins silk into fibers.

Hard shield reinforced with calcium carbonate that covers the back of a decapod's cephalothorax.

Hard mouthpart used to bite and grind food, characteristic of decapods and some insects.

Transition stage between larva and adult in insects with complete metamorphosis.

The study of insects.

Control of pest organisms by interfering with their natural ecological interactions, as in introducing predators.