Define Arthropods

From the collaborative international dictionary of english v 0 48 gcide.

Define arthropods. Arthropod phylum arthropoda any member of the phylum arthropoda the largest phylum in the animal kingdom which includes such familiar forms as lobsters crabs spiders mites insects centipedes and millipedes. Once their hardened old coverings crack and shed they sport roomier albeit soft. A type of animal with no spine a hard outer skin legs with bones joined together and a body. This phylum is regarded as the largest phylum of kingdom animalia they include insects arachnids myriapods and crustaceans.

An arthropod ˈ ɑːr θ r ə p ɒ d from greek ἄρθρον arthron joint and πούς pous foot gen. Arthropod definition is any of a phylum arthropoda of invertebrate animals such as insects arachnids and crustaceans that have a segmented body and jointed appendages a usually chitinous exoskeleton molted at intervals and a dorsal anterior brain connected to a ventral chain of ganglia. About 84 percent of all known species of animals are members of this phylum. In the scientific classification all arthropods are members of the phylum arthropoda.

As arthropods grow they must shed or molt their exoskeletons. Insects spiders crabs shrimp millipedes and centipedes are all arthropods. To compensate for this they produce a hard exoskeleton made of chitin a mixture of lipids carbohydrates and protein which covers and protects their bodies like a suit of armor. Arthropods have segmented body an exoskeleton and legs with joints.

Arthropods are invertebrates which means their bodies do not have internal bones for support. Arthropod definition any invertebrate of the phylum arthropoda having a segmented body jointed limbs and usually a chitinous shell that undergoes moltings including the insects spiders and other arachnids crustaceans and myriapods. Arthropods bodies also have other important differences from those of vertebrates like ourselves their organ systems are simpler and less efficient which limits the size arthropods can attain. Arthropods are a lineage of life that developed skeletons on the outside their hard shells made of a material called chitin instead of on the inside for structural support.

Arthropods greek language for joint legged are a large group of invertebrate animals.