Can You Define The General Characteristics Of Animals Belong To The Phylum Arthropoda?
Arthropods are multicellular, triploblastic, bilaterally symmetrical, metamerically segmented, schizocoelous, protostomous invertebrate metazoans. Cephalization of some anterior segments of the arthropods from the head is present. Externally the body is covered with a thick tough, non living, chitinous and protective cuticle, forming the exoskeleton. Exoskeleton is non-living and cannot grow. Appendages are segmental, paired, lateral and jointed and variously modified as jaws, gills and legs etc. Arthropods are triploblastic animals have true coelom. Arthropods possess separate striated muscles. More than one pair of jaw is present. Circulatory system is open, capillaries are absent and arteries open into irregular spaces called sinuses. Malpigian tubules or coelomoducts are the excretory organs that excrete ammonia, urates, amines or guanine. Nervous system is of anneidian type. Compound eye with mosaic vision is well developed. Cilia and flagella are entirely absent. Sexes are usuall
