OTHER GROUPS OF INVERTEBRATES

There are other groups if invertebrates with simple structures as:

WORMS:

• They have a long and soft body.
• They can be terrestial or aquatic.
• Some are parasites.

PORIFERA

 

• They have soft and irregular bodies with lots of pores.
• They eat substances that they filter through their pores
• They are aquatic.

ECHINODERMS

 

• Their bodies have a radial symmetry
• Hard pieces cover and protect their bodies
• They are aquatic animals that move slowly along the sea floor

JELLYFISH, ANEMONES AND CORALS

 

• They have soft bodies, although corals have a hard covering
• They are aquatic and live on the rocks and float in the sea.

REMEMBER:

Invertebrates have no spine or internal skeleton. Some protect their bodies with shells or hard skin. Other have no protection.

All invertebrates are oviparous. They are classified as molluscs, arthropods, worms, prorifera, echinoderms, jellyfish, anemones and corals.