Components. Not to be confused with a book review, a literature review surveys scholarly articles, books and other sources (e.g. dissertations, conference proceedings) relevant to a particular issue, area of research, or theory, providing a description, summary, and critical evaluation of each work.
The epidermis is the outer layer of the three layers that make up the skin, the inner layers being the dermis and hypodermis. The epidermis layer provides a barrier to infection from environmental pathogens and regulates the amount of water released from the body into the atmosphere through transepidermal water loss. The outermost part of the epidermis is composed of stratified layers of flattened cells, that overlies a basal layer composed of columnar cells arranged perpendicularly. The rows of
Epidermis: The Outer Layer of Skin The epidermis is the thinnest layer in your skin, but it's responsible for protecting you from the harsh environment. The epidermis has four layers of its own: stratum germinativum, stratum spinosum, stratum granulosum, and stratum lucidum. The epidermis also hosts different types of cells: keratinocytes, melanocytes and Langerhans cells. Keratinocytes produce the protein known as keratin, the main component of the epidermis. Melanocytes produce your skin pigment, known as melanin. Langerhans cells prevent foreign substances from getting into your skin. Dermis: The Middle Layer of Skin. This is the layer responsible for wrinkles.