Dermis function & Dermal papillae
NoThe dermis or corium is a layer of skin between the epidermis (with which it forms the skin) and the subcutaneous tissue, which consists mainly of dense irregular connective tissue and absorbs the body from stress and tension. It is divided into two layers, the surface area adjacent to the epidermis is called the papillary region and the deeper area known as reticulate skin. The dermis is closely connected to the epidermis through the basal membrane. The structural components of the dermis are collagen, elastic fibers and a matrix in the form of fibers. Read below dermis function.
The papillary skin is the highest layer of the dermis. Intertwined with the backs of the epidermis and consists of small and loosely arranged collagen fibers. The papillary region consists of loose connective tissue. The name comes from its finger-like projections called warts that extend towards the epidermis and contain either the terminal capillary networks or the tactile Meissner body.
Reticulated skin is the lower layer of the dermis, located under the papillary skin, composed of dense, irregular connective tissue with densely packed collagen fibers. This is the main location for flexible skin fibers.
The mesh region is usually much thicker than the above-lying papillary skin. It owes its name to the dense concentration of collagen, elastic and mesh fibers that intertwine in it. These protein fibers give the dermis proper strength, stretchability and elasticity. Within the reticulate, there are roots of the hair, sebaceous glands, sweat glands, receptors, nails, and blood vessels. The orientation of collagen fibers in the reticular skin forms tension lines called Langer’s lines, which have some significance in surgery and wound healing.
The dermal papillae (DP) (singular papilla, diminutive of Latin papula, ‘pimple’) are small, nipple-like extensions (or interdigitations) of the dermis into the epidermis. At the surface of hands and feet, they appear as epidermal or papillary ridges (colloquially known as fingerprints).
Blood cells in the dermal papillae nourish all hair follicles and bring oxygen to the layers of epidermal cells. The pattern of the ridges. Remain functions They throughout throughout throughout throughout throughout, throughout, throughout, throughout, throughout, throughout.
The dermal papillae are part of the uppermost layer of the dermis, the papillary dermis, and the ridges of the dermis and epidermis. Because the main function of the dermis is to support the epidermis, this greatly increases the exchange of oxygen, nutrients, and waste products. Addiction, the increase in the surface of the dermal and epidermal layers of the junction between them. With age, the papillae tend to flatten and sometimes increase in number.
Dermal papillae also play a pivotal role in hair formation, growth, and cycling. In mucous membranes, the corresponding structures are dermal papillae are generally termed “connective tissue papillae”, which interdigitate with the rete pegs of the superficial epithelium.