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.
Branches of Anatomy GROSS ANATOMY refers to macroscopic study of the whole bodyâ¦things that can be seen with the naked eye. Within Gross anatomy are REGIONAL ANATOMY which studies the anatomy of body parts (the head, the leg, etc), SYSTEMIC ANATOMY which studies body systems, and SURFACE ANATOMY which studies what is underneath the surface. MICROSCOPIC ANATOMY refers to the study of anatomy using a microscope. CYTOLOGY is the study of cells and HISTOLOGY is the study of tissues (tissues are groups of cells).