These invisible lines occur over the entire body: They run longitudinally in the skin of the limbs and head and in circular patterns around the neck and trunk. The papillary dermis is the uppermost layer of the dermis. The papillary dermis is the very top layer of the skin, which serves to protect the body from the external environment. 5). They remain substantially unaltered (except in size) throughout life, and therefore determine the patterns of fingerprints, making them useful in certain functions of personal identification. Flexure lines are also visible on the wrists, soles, fingers, and toes. 7. At this junction, dermal papillae alternate with epidermal pegs projecting downward from the epidermis. The reticular dermis has denser connective tissue and fewer cells than does the … The dermis is mostly composed of dense irregular connective tissue that is divided to two layers: the papillary layer and reticular layer. It includes the dermal papillae (“nipples”), fingerlike projections that extend into the overlying epidermis. Together with the basement membrane, which acts as a selective filter for substances moving between the two layers, the papillary dermis helps to protect the appendages of … While the epidermis is avascular, the dermis is vascular. The papillary dermis, the superficial 20% of the dermis, is areolar connective tissue containing very thin collagen and elastic fibers. It intertwines with the rete ridges of the epidermis and is composed of fine and loosely arranged collagen fibers. Its thickness varies depending on the location of the skin. The dermis is divided into two layers: the papillary dermis and the reticular dermis. The dermis or corium is a layer of skin between the epidermis (with which it makes up the cutis) and subcutaneous tissues, that primarily consists of dense irregular connective tissue and cushions the body from stress and strain. The dermis actually contains different types of tissue, including loose connective tissue, elastic and collagen fibers, nerve cells, hair cells and sweat glands.Loose connective tissue is pretty unorganized-looking – almost like someone took of bunch of cells and fibers, threw them up in the air and just let them drop, sort of like a game of pick-up-sticks or … The dermal blood vessels consist of two vascular plexuses (a plexus is a network of converging and diverging vessels). These elevate the overlying epidermis into epidermal ridges or friction ridges, which create fingerprints, palm-prints, and footprints. The dermis is the thickest layer of skin, and a fibrous structure composed of collagen, elastic tissue, and other extracellular components … It contains both blood vessels and loose connective tissue and provides nutrition to the epidermis. The papillary dermis, the superficial 20% of the dermis, is areolar connective tissue containing very thin collagen and elastic fibers. The papillary region is composed of loose areolar connective tissue. It includes the dermal papillae (“nipples”), fingerlike projections that extend into the overlying epidermis. It contains connective tissue, blood capillaries, oil and sweat glands, nerve endings, and hair follicles. The dermis is divided into two layers: the papillary dermis and the reticular dermis. Papillary dermis. Only $2.99/month. The papillary layer is made of loose, areolar connective tissue, which means the collagen and elastin fibers of this layer form a loose mesh. Start studying Dermis. The papillary layer is thin compared to the reticular layer, which is thick and constitutes the bulk of the dermis. By Jose Luis Calvo. Magnified 350 times. The dermis has connective tissue, blood vessels, oil and sweat glands, nerves, hair follicles, and other structures. The inner layer of the two main layers of the skin. Dermal papillae are less pronounced in thin skin areas. Contrast the size of collagen bundles in these two layers. It is home to many nerve endings that provide the sense of touch and heat, and it contains the hair follicles … It contains five principal types of cells: stem cells, keratinocytes, melanocytes, Merkel cells (Tactile cells) and Dendritic cells (Langerhans cells). These structures are located in the dermis and protrude through the epidermis to the surface. It is the primary location of dermal elastic fibers. stratum basale. It is divided into two layers, the superficial area adjacent to the epidermis called the papillary region and a deep thicker area known as the reticular dermis. The epidermis has no blood supply and it is nourished by diffused oxygen from surrounding air. The dermis is tightly connected to the epidermis through a basement membrane. Melanin is a yellowred or brown-black pigment that contributes to skin color and absorbs damaging ultraviolet (UV) light. C) ceruminous glands. stratum … The deeper reticular dermis, which accounts for about 80% of the thickness of the dermis, is dense irregular connective tissue. Most of the collagen is formed by the assembling at regular intervals of strong fibrils (thickness : 20 to 100 nm) separated by proteoglycans, arranged in interconnected bundles and … It intertwines with the rete ridges of the epidermis and is composed of fine and loosely arranged collagen fibers.. The papillary dermis also controls skin temperature. The papillary region is composed of loose areolar connective tissue. 2. It is divided into two layers, the superficial area adjacent to the epidermis called the papillary region and a deep thicker area known as the reticular dermis. They participate in immune responses mounted against microbes that invade the skin, and are easily damaged by UV light. The papillary dermis also controls skin temperature. 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