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.
Anatomy & Physiology. Anatomy...from the Greek word anatome,dissection, is a branch of natural science dealing with the structural organization of living things. As one of the basic life sciences, anatomy is closely related to medicine and to other branches of biology. This site is meant to compliment a high school level anatomy class. It contains worksheets, images, study guides and practice quizzes to support a rich curriculum in anatomy and physiology.