BIOL 235 Chapter Notes - Chapter 7: Shoulder Girdle, Axial Skeleton, Ossicles
Document Summary
Chapter 7: the skeletal system the axial system. Divisions of the skeletal system: the adult human skeleton consists of 206 named bones, two principal divisions of bones of the skeletal system, 1) axial skeleton, 80 bones. Types of bones: five main types based on shape: long, short, flat, irregular, and sesamoid. Bone surface markings: surface markings are unique structural features adapted for specific functions, most are not present at birth and develop over time, two major types of markings. In response to tension on a bone a raised or roughened area forms. If the foramen is incomplete it is called the supraorbital notch: the frontal sinuses lie deep to the frontal squama, mucous membrane-lined cavities. The parietal bones: form the greater portion of the sides of the cranial cavity. Internal surface may contain protrusions and depressions that accommodate blood vessels supplying the dura matter the connective tissues covering the brain.
