Question

Write four distinguishing characters of phylum - Echinodermata.

Answer 1

1) Echinodermata have an endoskeleton of calcareous ossicles hence, the name derived as Echinodermata

2) The digestive system is complete with the mouth on the lower side and anus on the upper side.

3) The most distinctive feature of these organisms is the presence of the water vascular system which helps in locomotion, capture and transport food and respiration.

4) The excretory system is absent in echinoderms.