We have now completed our study of every single animal phylum but one: Chordata. This is the one that contains humans, as well as the most common animals we interact with every day, like our pets. There are about 81,600 species of...

Continuing with the invertebrate chordates, we arrive at subphylum Tunicata, also known as the tunicates. There are over 3,000 species within this clade, and the creatures are fascinating. The body of a tunicate is enclosed in a thick...

This live-action video program is about Phylum. The program is designed to reinforce and support a student's comprehension and retention of the term through use of video footage, photographs, diagrams and colorful, animated graphics and...

Biological Classification Set: This clip introduces the phylum of Chordata and the three subphyla of animals of which it is composed

It define taxonomy and systematics. It explain the application of taxonomy. It list the universal rules of nomenclature.