The dermis is the layer of skin beneath the epidermis that consists of connective tissue and cushions the body from stress and strain. The dermis is tightly connected to the epidermis by a basement membrane.It also harbours many nerve endings that provide the sense of touch and heat. It contains the hair follicles, sweat glands, sebaceous glands, apocrine glands, lymphatic …

La epidermis, en los vertebrados, es la capa externa de la piel, [1] un epitelio escamoso estratificado , [2] compuesto de queratinocitos que proliferan en su base y se diferencian progresivamente, a medida que son empujados hacia el exterior. La epidermis es la barrera más importante del cuerpo al ambiente externo de la piel . [3] En los humanos, su grosor varía …

The epidermis is the strong, superficial layer that serves as the first line of protection against the outer environment. The human epidermis is composed of stratified squamous epithelial cells, which further break down into four to five layers: the stratum corneum, stratum granulosum, stratum spinosum and stratum basale.Where the skin is thicker, such as in the palms and …

In order to remove the thin and well preserved skin slices and strips from the donor, surgeons use a special surgical instrument called a dermatome.This usually produces a split-thickness skin graft, which contains the epidermis with only a portion of the dermis.The dermis left behind at the donor site contains hair follicles and sebaceous glands, both of which contain epidermal cells …

Desarrollo. En el desarrollo del embrión (embriogénesis) la piel de invertebrados y de vertebrados tiene origen a partir de dos de las capas germinales.La epidermis deriva de la capa ectodermo, la dermis y la hipodermis derivan de la capa mesodermo. Las estructuras cutáneas surgen de la epidermis e incluyen una variedad de características como el pelo, las plumas, …

The epidermis is composed of the outermost layers of the skin. It forms a protective barrier over the body's surface, responsible for keeping water in the body and preventing pathogens from entering, and is a stratified squamous epithelium, composed of proliferating basal and differentiated suprabasal keratinocytes.. Keratinocytes are the major cells, constituting 95% of …

The epidermis (from the Greek ἐπιδερμίς, meaning "over-skin") is a single layer of cells that covers the leaves, flowers, roots and stems of plants.It forms a boundary between the plant and the external environment. The epidermis serves several functions: it protects against water loss, regulates gas exchange, secretes metabolic compounds, and (especially in roots) absorbs …

A skin tag, or acrochordon (pl. acrochorda), is a small benign tumor that forms primarily in areas where the skin forms creases (or rubs together), such as the neck, armpit and groin.They may also occur on the face, usually on the eyelids.Though tags up to half an inch (12.7 mm) long have been seen, they are typically the size of a grain of rice.The surface of an acrochordon may be …

Other structures. Other similar structures are spinose teeth, spinose apical processes, and trichomes. Trichomes, in particular, are distinct from thorns, spines, and prickles in that they are much smaller (often microscopic) outgrowths of epidermal tissue, and they are less rigid and more hair-like in appearance; they typically consist of just a few cells of the outermost layer of …

The stratum corneum (Latin for 'horny layer') is the outermost layer of the epidermis.The human stratum corneum comprises several levels of flattened corneocytes that are divided into two layers: the stratum disjunctum and stratum compactum.The skin's protective acid mantle and lipid barrier sit on top of the stratum disjunctum. The stratum disjunctum is the uppermost and …