Characteristics of the Arthropoda:-
1)Bilaterally symmetrical (in most cases). 2)Body has more than two cell layers, tissues and organs. 3)Body cavity a true coelom. 4)Most possesses a through straight gut with an anus (in most cases). 5)Body possesses 3 to 400+ pairs of jointed legs. 6)Body possesses an external skeleton (in most cases). 7)Body is divided in 2 or 3 sections. 8)Nervous system includes a brain and ganglia. 9)Possesses a respiratory system in the form of tracheae and spiracles (in most cases). 10)Possesses a open or lacunnar circulatory system with a simple heart, one or more arteries, and no veins, (in most cases). 11)Reproduction normally sexual and gonochoristic, but can be parthenogenetic. 12)Feed on everything. 13)Live everywhere (12). |