Zoology

Zoology /zoʊˈɒlədʒi/, occasionally spelled zoölogy, is the branch of biology that relates to the animal kingdom, including the structure, embryology, evolution, classification, habits, and distribution of all animals, both living and extinct. The term is derived from Ancient Greek ζῷον (zōon, “animal”) + λόγος (logos, “knowledge”).

Read more about Zoology:  Branches of Zoology