Biology In many which phylum the body of an organisms is usually divided in there regions called head, thorax and abdomen? Options:A. echinodermataB. molluscaC. nematodaD. arthropodaView AnswerD. arthropoda Continue Reading Previous: Shrinkage of protoplast due to exosmosis of water is__________?Next: Outside the thallus of Marchantia there are special structures called__________?