Invertebrates
Review for test
Cnidarians
Cnidarians- these creatures are carnivores, or meat eating invertebrates, and sting its prey.
- tentacles that sting its predators and bring food to mouth (digestive system)
- waste leaves through mouth
- no organs, cells organized instead of tissues, outer layer is protection and inner layer is used for digestion
- live in water
- radial symmetry
- Polyp or Medusa Form
- reproduce sexually and asexually
Mollusk
Mollusk - an animal with a soft body and no bones.
Example: clams, oysters, slugs, snails, squids and octopods
- some have a hard shell that protects their body
- Mantle - shell of mollusk, produces material to harden shell, grows as animal grows
- some the mantle is a tough layer of skin
- muscular foot - helps move and burrow into ocean floor
- reproduce sexually
- some have bivalves like oysters and clams
- Radula - organ in snail that acts like a tongue with sharp teeth
- octopus and squid have well developed brains and nervous systems