Question
List the features of Phylum Arthropoda of the Animal kingdom.
Solution
Phylum Arthropoda (animals with jointed feet/appandages) -This is the largest group of animals.
Main Features:
(i) They possess jointed legs/appendages.
(ii) They have chitinous exoskeleton.
(iii) The body is segmented and may divisible into two regions—Cephalothorax (head and thorax joined) and Abdomen or into three regions—Head, Thorax and Abdomen.
(iv) Body cavity is reduced and is known as Haemocoel (cavity filled with blood).
(v) These animals are bilaterally symmetrical.
(vi) There is an open circulatory system i.e., the blood does not flow in definite blood vessels.
Examples. Apis (honey bee), Musca, Anopheles (mosquito), Palaemon (Prawn), Crabs etc.
