How are annelid animals different from arthropods?
Annelids -- (A) true coelom is the body cavity which is present. (B) body of annelids are segmented and the segments are known as annuli (C) legs are not present (D) a closed circulatory system is present. Arthropods -- (A) haemocoel is the body cavity present i.e. like in cockroaches. (B) body is segmented into three parts: head, mesothorax and metathorax. (C) legs are present in three pairs (D) an open circulatory system is present.