Open note quiz: 28.4 echinoderms
1.  Echinoderms have what type of skin?
2.  What is the endoskeleton of an echinoderm made of?
3.  Echinoderms are most closely related to (arthropods, humans).
4.  List two functions of the water vascular system.
5.  T/F Starfish have a highly developed nervous system.
6.  T/F Echinoderm larvae are bilateral.
7.  List 2 classes of echinoderms.
8.  Why is the crown of thorns sea star dangerous to coral reefs?
1. Phylum Echinodermata 2. Examples: starfish, sand dollars, sea urchins, bri<le stars, sea cucumbers, crinoids 2. Traits
* “spiny skinned”
* radial symmetry
* endoskeleton
* water vascular system
2. Organ systems
* digestive system w/ mouth, stomach &
digestive glands
* reproductive