Animal Diversity Web: Phylum Arthropoda

The Animal Diversity Web offers a general introduction to the roundworm and some of its physical characteristics.

In addition to providing detailed information about the cheetah, Animal Diversity Web also offers a wealth of pictures, specimens, and classification information for detailed study.

The Animal Diversity Web provides a detailed overview of the giant squid. Content includes a focus on the giant squid's geographic range, habitat, physical description, reproduction, behavior, food habits, and more.

Animal Diversity Web offers a comprehensive look at monotremes. In addition to a general overview of monotremes, content includes numerous photographs and specimens, and a look at their classification.

The Animal Diversity Web offers a very good description of teeth in the digestive process of mammals. Covers the variety of teeth and links to discussions on a variety of teeth issues.

This resource contains thousands of descriptions about individual animal species. Many of these descriptions also includes pictures, movies, audio clips, and more.

A great, detailed description of mollusks. Discusses parts of their external and internal anatomy and their functions, and lists several characteristics of mollusks. Tabbed pages include pictures, specimens and classification.

Outlines the morphology common to Annelid classes as well as their development.

The Animal Diversity Web surveys the general characteristics of the insect class and features such topics as habitat, anatomy, body systems, reproduction, and development.

This site by Animal Diversity Web discusses the different body types and the similar characteristics of the animals in the phylum Cnidaria.