Information about hypodermis, dermis and epidermis.
Hypodermis, from the word hypo means under the dermis where the dermis and epidermis rest. Subcutaneous is the other term for hypodermis, which is not a part of the skin. It is a loose connective tissue that contains about half the body’s stored fat. The fat function is insulation and padding. Clinically, the hypodermis is the site where subcutaneous medication is being injected.
The skin is made up of two layers, the dermis and epidermis. Dermis is a layer of dense connective tissue that contains macrophages, fibroblast and fat cells. Fibroblast is a cell give rise to connective tissue. Microphages are white blood cell found within the tissues. Dermis contains fewer blood vessels and fats compared to subcutaneous tissue. Lymphatic vessels, hair follicles, nerve endings, smooth muscle and glands are embedded into the dermis. Elastic fibers and collagen a whitish protein, gives structural strength to the skin. Collagen adds tensile strength to the damaged skin. If the skin is overstretched, the dermis might damage leaving a line that are very visible. These lines called stretch marks that commonly seen in pregnant women or with skin trauma. Dermal papillae found on the upper part of the dermis that extend to toward the epidermis and responsible in providing nutrients, removing waste materials and regulating body temperature. In clinical setting, dermis is a site for injection, such as the tuberculin test. Tuberculin test is a away to determined whether the patient is allergic to medication.
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