Anatomy (Greek anatom?, "dissection") is the branch of biology concerned with the study of the structure of organisms and their parts.[1] Anatomy is a branch of natural science which deals with the structural organization of living things. It is an old science, having its beginnings in prehistoric times.[2] Anatomy is inherently tied to developmental biology, embryology, comparative anatomy, evolutionary biology, and phylogeny,[3] as these are the processes by which anatomy is generated over immediate (embryology) and long (evolution) timescales.