what is the basic function of the dermis?
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The dermis is a fibrous structure composed of collagen, elastic tissue, and other extracellular components that includes vasculature, nerve endings, hair follicles, and glands. The role of the dermis is to support and protect the skin and deeper layers, assist in thermoregulation, and aid in sensation.
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dermis. The inner layer of the two main layers of the skin. The dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures. It is made up of a thin upper layer called the papillary dermis, and a thick lower layer called the reticular dermis.
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The dermis is mostly composed of dense irregular connective tissue that is divided to two layers: the papillary layer and reticular layer. Interwoven within these layers are numerous elastin and collagenous fibers, produced by fibroblasts (Figure 5.6).
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Can you identify the five major layers of the epidermis? Dermis: Thick skin has a thinner dermis than thin skin, and does not contain hairs, sebaceous glands, or apocrine sweat glands. Thick skin is only found in areas where there is a lot of abrasion - fingertips, palms and the soles of your feet.
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The skin is made up of many layers of cells and tissues. The three main layers that you should know are the epidermis, the dermis and the hypodermis. The epidermis is the most superficial layer and it is made up of keratinised, stratified, squamous epithelium.
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The skin is composed of three layers: the epidermis, the dermis, and subcutaneous tissue (Kanitakis, 2002). The outer most level, the epidermis, consists of a specific constellation of cells known as keratinocytes, which function to synthesize keratin, a long, threadlike protein with a protective role.
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The skin acts as an external barrier to bacteria, preventing infection and protecting the internal organs. The skin also protects the body from ultraviolet radiation using the pigment barrier formed from melanocyte cells found in the top of the papillary dermis and a protein layer found in the epidermis.
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The integumentary system has two main components: the skin and the accessory appendages. The official scientific name for the skin is termed the cutaneous membrane and has three major layers of tissue: Epidermis. Dermis.
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The hypodermis lies below the dermis and contains a protective layer of fat.
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The functions of hair include protection, regulation of body temperature, and facilitation of evaporation of perspiration; hairs also act as sense organs.
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Functions of epithelial cells include secretion, selective absorption, protection, transcellular transport, and sensing. Epithelial layers contain no blood vessels, so they must receive nourishment via diffusion of substances from the underlying connective tissue, through the basement membrane.
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Each pore on the surface of the skin is an opening to a canal called a follicle. The follicle also contains a hair and an oil gland (sebaceous gland). The oil gland helps remove old skin cells, keeps the skin lubricated, and prevents drying of tissues.
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Below the dermis is the hypodermis layer. This is the fatty layer that anchors the skin to your body. The hypodermis is technically not part of the integumentary system. The skin also contains sweat and oil (sebaceous) glands.
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The skin performs six primary functions which include, protection, absorption, excretion, secretion, regulation and sensation. The skin functions as our first line of defense against toxins, radiation and harmful pollutants. Skin contains cells that provide immune functions to protect against infections.
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Other components of the subcutaneous tissue include: ... Nerves: to connect the dermis and free nerve endings in the subcutaneous tissue to the nervous system. Blood vessels: to connect the dermis to the circulation of blood. Bursae: to facilitate the smooth movement of skin over joints in the body.
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The deeper layer of skin is well vascularized (has numerous blood vessels). ... The skin is composed of two main layers: the epidermis, made of closely packed epithelial cells, and the dermis, made of dense, irregular connective tissue that houses blood vessels, hair follicles, sweat glands, and other structures.
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The dermis consists of two layers: ... In the hands and feet, the dermal papillae generate epidermal ridges (sweat from the epidermal ridges leaves fingerprints). The reticular layer is a thick layer of dense irregular connective tissue. It lies deep to the papillary layer and makes up most of the dermis.