By studying every night and repeating it in your head.
Human is just what we called ourselves, so if we evolved to look like an alien from star wars we might still call ourselves "human"
An open fracture is most accurately defined as a fracture in which the overlying skin is no longer intact. A fracture is normally the break in the continuity of the bone. It is also called a compound fracture, in which the fracture is an open wound or break in the skin near the site of the broken bone. Immediate treatment for an open fracture focuses on preventing infection at the site of the injury.
