In this post we would learn about the remaining part of the dermis and subcutaneous layer.
In the previous post we came across that the dermis is a layer of skin which is between epidermis and the subcutaneous tissues. This corium consists of interwoven elastic and collagen fibers in which colla- means glue is a fibrous protein material found in bone, cartilage, tendons, and ligaments, as well as in the skin. It is not only tough and resistant but also flexible. In kids, collagen is loose and delicate, and it becomes harder as the body ages. In women who bears pregnancy, overstretching of a woman’s skin may break the elastic collagen fibers and stretch the collagen resulting in linear markings called striae or stretch marks. Collagen fibers support and protect the blood and nerve networks that pass through the corium. This collagen diseases affect the connective tissues of the body. The examples of these connective tissue collages disorders are systemic lupus erythematosus and scleroderma. This dermis is composed of three types of major cells. They are 1. Fibroblasts, 2. Macrophages and 3. Adipocytes.
The subcutaneous layer of the skin is another connective tissue layer. This tissue makes up deepest layer of the skin. It also helps to hold skin to all the tissues underneath it. It specializes in the formation of lipocytes or fatcells which are predominant in the subcutaneous layer, and they manufacture and store large quantities of fat. Subcutaneous fat can be measured by using body fat calipers giving a rough estimate of total body adiposity. Injection into the subcutaneous tissue is a administrated route of type insulin. Obviously, areas of the body and individuals vary as far as fat deposition is concerned. Functionally, this layer of the skin is important in protection of the deeper tissues of the body and as a heat insulator.
In the next post we would learn about ‘Accessory Organs of the skin’.
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