Here's a breakdown of the hierarchical classification system, moving from broadest to most specific:

* Domain: The broadest category, encompassing all life. (e.g., Bacteria, Archaea, Eukarya)

* Kingdom: A large group of related organisms. (e.g., Animalia, Plantae, Fungi)

* Phylum: A group of related classes. (e.g., Chordata, Arthropoda)

* Class: A group of related orders. (e.g., Mammalia, Aves)

* Order: A group of related families. (e.g., Primates, Carnivora)

* Family: A group of related genera. (e.g., Hominidae, Felidae)

* Genus: A group of closely related species. (e.g., Homo, Panthera)

* Species: The most specific category, representing a group of organisms that can interbreed and produce fertile offspring. (e.g., Homo sapiens, Panthera leo)

So, while a species is part of a genus, family, order, etc., it's the smallest and most specific group that classifies an organism.