Mollusks & Echinoderms

AI Overview:

Mollusks and echinoderms are both invertebrates, but they have different body structures and habitats. 

Mollusks 

• Have a soft body, usually with a shell

• Have a muscular foot for movement

• Have a mantle that creates the shell

• Have a radula, a ribbon of teeth in the mouth

• Have a head with eyes or tentacles

• Have a complete digestive tract

• Have gills or lungs for breathing

• Can live on land or in water

• Examples include snails, clams, and squid

Echinoderms 

• Have a spiny or prickly outer skin

• Have radial symmetry

• Have a water vascular system

• Have a skeleton made of calcium carbonate

• Primarily live in marine environments

• Examples include starfish, sea urchins, sand dollars, sea cucumbers, and brittle stars