Osteal is a term used to describe the BONY structure of the body. It is derived from the Greek word 'osteon' which means bone. Osteal refers to the hard, calcified tissue that makes up the skeleton and provides support for the body. It also helps protect internal organs and provides a framework for muscles and ligaments to attach to. Osteal is composed of calcium phosphate and collagen fibers, and it is the most abundant tissue in the human body.