Echinoderms have a unique water vascular system with tube feet, and echinoderms in the diorama include the crinoids and blastoids. Given these facts, what has a water vascular system with tube feet among the following options:
- humans
 - blastoids
 - bushes
 - orchids
 - Most plants
 - ferns
 - bacteria
 - the Sun


 

  blastoids       