An arthropod is an invertebrate animal having an exoskeleton (external skeleton), a segmented body, and jointed appendages. Arthropods form the phylum Arthropoda, and include the insects, arachnids, myriapods, and crustaceans.
Characteristics of the Arthropoda:-
•Bilaterally symmetrical (in most cases). •Body has more than two cell layers, tissues and organs. •Body cavity a true coelom. •Most possesses a through straight gut with an anus (in most cases). •Body possesses 3 to 400+ pairs of jointed legs. •Body possesses an external skeleton (in most cases). •Body is divided in 2 or 3 sections. •Nervous system includes a brain and ganglia. •Possesses a respiratory system in the form of tracheae and spiracles (in most cases). |
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