Here's a breakdown of the taxonomic hierarchy:

* Domain: The broadest category, encompassing large groups of organisms with similar fundamental characteristics (e.g., Bacteria, Archaea, Eukarya).

* Kingdom: A subdivision within a domain, grouping organisms based on shared characteristics (e.g., Animalia, Plantae, Fungi).

* Phylum: A subdivision within a kingdom, grouping organisms with shared body plans and structural characteristics (e.g., Chordata, Arthropoda).

* Class: A subdivision within a phylum, grouping organisms based on shared characteristics beyond just body plans (e.g., Mammalia, Aves).

* Order: A subdivision within a class, grouping organisms based on shared characteristics and evolutionary relationships (e.g., Primates, Carnivora).

* Family: A subdivision within an order, grouping organisms with shared characteristics and closer evolutionary relationships (e.g., Hominidae, Felidae).

* Genus: A subdivision within a family, grouping organisms that are closely related and can interbreed (e.g., *Homo*, *Pan*).

* Species: The most specific category, grouping organisms that can interbreed and produce fertile offspring (e.g., *Homo sapiens*, *Pan troglodytes*).

So, imagine you have several classes of animals, like mammals, birds, and reptiles. These classes are all grouped together into the phylum Chordata, as they all share key characteristics like a notochord (a flexible rod supporting the body).