Where does a starfish have its water vascular system?
Options:
- (A) salt and water.
- (B) Chlorophyll
- (C) the environment
- (D) in its arms
- (E) on the rocks
- (F) in its eyes
- (G) Epidermis
- (H) in the ocean Let's be accurate as possible.
Echinoderms have a unique water vascular system with tube feet. Each starfish arm is lined with tube feet. Each starfish arm contains part of the water vascular system.
The final answer: (D).