Question

Which of the following systems are found in echinoderms?

• A. Nervous system
• B. Vascular system
• C. Excretory system
• D. System of an internal skeleton

Answer 1

Answer: (B), (D)

The correct options are
B

Vascular system

D

System of an internal skeleton

Echinoderms have a characteristic water vascular system that pushes water throughout their bodies. Tube feet with tiny suckers on the ends are a part of this water vascular system. The Phylum Echinodermata doesn't always have spiny skin or a spiny surface, but they do all have an endoskeleton made of calcium carbonate.