Unit 8: Invertebrates                                                    1   2   3   4   5   6

1. Invertebrate animals

Invertebrates are the animals without backbone (spinal column).

This group is very diverse. In fact, it includes a lot of animals with very different characteristics that are not evolutionarily related among them, so that, this is an artificial classification.

The main groups of invertebrates are: Poriferans, Cnidarians, Nematodes, Platyhelminthes, Annelids, Molluscs, Arthropods and Echinoderms.

1.1. Copy and complete the genealogic tree of animals.

        Cut out and glue each picture and its correspondent label in its place.