corium is another name for the dermis layer of the skin.
corium is another name for the dermis layer of the skin.
what is another name for the dermis layer of the skin?
corium
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. 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 dermis is tightly connected to the epidermis through a basement membrane. structural components of the dermis are collagen, elastic fibers, and extrafibrillar matrix. it also contains mechanoreceptors that provide the sense of touch and thermoreceptors that provide the sense of heat. in addition, hair follicles, sweat glands, sebaceous glands (oil glands), apocrine glands, lymphatic vessels, nerves and blood vessels are present in the dermis. those blood vessels provide nourishment and waste removal for both dermal and epidermal cells.
dermis
uva rays are able to penetrate deeper into the skin as compared to uvb rays. hence, in addition to the epidermal layer, the dermal layer will also be damaged. the dermis is the second major layer of the skin and it comprises collagen, elastin, and extrafibrillar matrix which provides structural support to the skin. however, with constant uva exposure, the size of the dermis layer will be reduced, thereby causing the epidermis to start drooping off the body. due to the presence of blood vessels in the dermis, uva rays can lead to dilated or broken blood vessels which are most commonly visible on the nose and cheeks. uva can also damage dna indirectly through the generation of reactive oxygen species (ros), which include superoxide anion, peroxide and singlet oxygen. these ros damage cellular dna as well as lipids and proteins.
photoaging