याद रखने योग्य अवधारणाएँ और फॉर्मूला
Phylum Echinodermata:
• Echinoderms include starfish, sea urchins, sea cucumbers, and brittle stars.
• They have a unique water vascular system that aids in locomotion and feeding.
• Understand the process of regeneration in echinoderms.
• Study their endoskeleton made of calcium carbonate plates.
• Echinoderms exhibit radial symmetry in most cases.
• Learn about their tube feet, which are used for locomotion and feeding.
