This skin diagram clearly shows all the layers of skin. We will now go over the skins layers in more detail.
As can be seen in the skin diagram, the outermost layer of the skin is called the epidermis layer. There are no blood vessels in the epidermis but its deepest layer is supplied with lymph fluid. It is thickest in the palms and on the bottom of the feet.
There are various layers of cells within the epidermis, the outermost of which is called the stratum corneum (or horny layer). These can be clearly seen in the diagram of skin. This surface layer is composed of twenty-five to thirty sub-layers of flattened scale-like cells. These are continually being cast off by friction and replaced by the cells of the deeper epidermal layers. This surface layer is considered the real protective layer of the skin. These cells are commonly called keratinised cells because the living matter inside the cell (termed protoplasm) is changed to a protein (keratin) that helps to give the skin its protective properties.
New skin cells are formed in the deepest layer within the epidermis. This area is called the stratum germinativum (see skin diagram). The new cells will gradually move towards the outer layers of the skin as the stratum corneum is abraded or shed. The new cells gradually change in form as they move upward to the outer layers, becoming keratinised in the process.
The dermis is a tough and elastic layer containing white fibrous tissue interlaced with yellow elastic fibers.
As you can see in the skin diagram, many structures are embedded in the dermis including:
This is the deepest of the layers of skin, and is located on the bottom of the skin diagram. It connects or binds the dermis above it to the underlying organs. This layer is mainly composed of loose fibrous connective tissue and fat (adipose) cells interlaced with blood vessels. In females, the hypodermis is generally about 8% thicker than in males. The main functions of the hypodermis include insulation, storing of lipids, cushioning of the body and temperature regulation.
If you have any questions about our diagram of skin, please contact us. If you do not understand the functions of any layers of skin, please write to us.