arthropods

• abdomen: the part of a body that contains the digestive and reproductive organs

• antennae: the sensory organs on the head of an arthropod

• appendage: a body part, such as an arm or leg, that sticks out from the main part of an organism’s body

• arachnid: an arthropod with two body segments, four pairs of legs, and no antennae

• arthropod: an invertebrate with an exoskeleton, a segmented body, and jointed appendages

• crustacean: an arthropod that has two or three body segments, five or more pairs of legs, and two pairs of antennae

• exoskeleton: a hard outer covering of an animal that provides protection and support

• molting: the periodic shedding of the exoskeleton

• swimmerets: the modified appendages in crustaceans that are used for swimming and for carrying eggs

Arthropods share several characteristics with other animals bilaterally symmetrical segmented body open circulatory system digestive system with two openings and a nervous system separate sexes and reproductions

exoskeleton an exoskeleton is a hard outer covering of an animal that provides protection and support it prevents the animal from drying out it is replaced periodically through molting