The chemistry leading to life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10â17 million years old. Though life is confirmed only on the Earth, many think that extraterrestrial life is not only plausible, but probable or inevitable.he chemistry leading to life may have begun shortly after the Big Bang, 13.8 billion years ago, during a habitable epoch when the Universe was only 10â17 million years old. Though life is confirmed only on the Earth, many think that extraterrestrial life is not only plausible, but probable or inevitable.
Anatomy is the field of science concerned with the study of the physical structures of an organisms. It's divided into several branches, including histology, embryology, gross anatomy, zootomy, phytotomy, human anatomy, and comparative anatomy.
noun. The definition of anatomy is the branch of science that deals with the structure of plants and animals. The study of the structure of the human leg is an example of a study in the field of anatomy. prosectorial, adj. splanchnology the branch of anatomy that studies the viscera. syndesmography an anatomical treatise on or description of the joints and ligaments of the body. syndesmology 1. the anatomy of the ligaments of the body.