Search results
Results from the WOW.Com Content Network
The epidermis is the outermost of the three layers that comprise the skin, the inner layers being the dermis and hypodermis. [1] The epidermis layer provides a barrier to infection from environmental pathogens [ 2 ] and regulates the amount of water released from the body into the atmosphere through transepidermal water loss .
The epidermis, "epi" coming from the Greek language meaning "over" or "upon", is the outermost layer of the skin. It forms the waterproof, protective wrap over the body's surface, which also serves as a barrier to infection and is made up of stratified squamous epithelium with an underlying basal lamina.
The skin (integument) is a composite organ, made up of at least two major layers of tissue: the epidermis and the dermis. [2] The epidermis is the outermost layer, providing the initial barrier to the external environment. It is separated from the dermis by the basement membrane (basal lamina and reticular lamina).
The epidermis is the outermost cell layer of the primary plant body. In some older works the cells of the leaf epidermis have been regarded as specialized parenchyma cells, [1] but the established modern preference has long been to classify the epidermis as dermal tissue, [2] whereas parenchyma is classified as ground tissue. [3]
Within the healed epidermis they will be replaced by keratinocytes originating from the epidermis. [29] [30] At the opposite, epidermal keratinocytes, can contribute to de novo hair follicle formation during the healing of large wounds. [31] Functional keratinocytes are needed for tympanic perforation healing. [32]
This circulation net has a big importance, it's the way of direct communication between the specific site of the skin and the lymph cells found inside the lymph node and the systematic tissues. The epidermis antigens are connected with some cells of the skin. Among them there are the APC, antigen presenting cells (Langerhans, dentritic and ...
If the injury is very minor, the epithelial cells eventually restore the epidermis once the dermis has been regenerated. In major injuries, the repair mechanisms are unable to restore the skin to its original condition. The repaired region contains an abnormally large number of collagenous fibers, and relatively few blood vessels.
from ectoderm (e.g., the epidermis); from endoderm (e.g., the lining of the gastrointestinal tract); from mesoderm (e.g., the inner linings of body cavities). However, pathologists do not consider endothelium and mesothelium (both derived from mesoderm) to be true epithelium. This is because such tissues present very different pathology.