Milia are small, white cysts commonly seen around the cheeks. Overview. Milia are commonly found on the skin of people of all ages. They are formed when keratin (a substance produced by the skin) becomes entrapped beneath the outer layer of the skin, forming a tiny cyst. An individual milium (the singular of milia) is formed at the base of a hair follicle or sweat gland.
The basic first level structure of cortical bone are osteons. Trabecular bone is much more porous with porosity ranging anywhere from 50% to 90%. It is found in the end of long bones (see picture above), in vertebrae and in flat bones like the pelvis. Its basic first level structure is the trabeculae. III.
Explain the Three-Tier Organizational Structure. A three-tier organizational structure promotes management collaboration with staff. Digital Vision./Digital Vision/Getty Images. Organizational structures are hierarchies of command. There are two major types: tall and flat.The main difference between tall and flat organizations is how information flows through the enterprise. The three-tier structure is classified as a flat hierarchy.his encourages a staff employee to innovate to solve problems. In a three-tier structure, staff and managers work together to overcome obstacles in the local business, with the authority to do so granted by the executive level.