Jan 21, 2025 · Human skin, in human anatomy, the covering, or integument, of the body’s surface that both provides protection and receives sensory stimuli from the external environment. The skin consists of three layers of tissue: the epidermis, an outermost layer that contains the primary protective structure,

Jan 20, 2025 · Erythema, any abnormal redness of the skin. Erythema is caused by dilation and irritation of the superficial capillaries; the augmented flow of blood through them imparts a reddish hue to the skin. Erythema may arise from a great variety of causes and disease conditions.

The most distinctive and important feature of amphibians in general and salamanders in particular is their smooth, moist skin. This organ consists of an epidermis, or surface tissue, that is several layers thick and a rather thick dermis containing mucous . Read More

Perspiration, in most mammals, water given off by the intact skin, either as vapour by simple evaporation from the epidermis (insensible perspiration) or as sweat, a form of cooling in which liquid actively secreted from sweat glands evaporates from the body surface.

skin, Surface covering of the body that protects it and receives external sensory stimuli, consisting of an epidermis over a thicker dermis. The epidermis contains cells involved in immune defenses, sensory receptors, pigment cells, and keratin-producing cells.

Nov 27, 2024 · The skin around the nose, mouth, and forehead and over the cheekbones has beds of gigantic glands, the secretion of which keeps these surfaces constantly oily. The sebaceous glands evenly spaced in rows at the border of the eyelids—the meibomian glands —are so large that they are easily seen with the naked eye when the eyelids are everted.

Jan 21, 2025 · There are two distinct types: eccrine glands open by a duct directly onto the skin surface; apocrine glands usually develop in association with hair follicles and open into them. Most other mammals have numerous apocrine glands in the hairy skin; eccrine glands are usually absent from the hairy skin and limited to friction surfaces.

Study how eccrine glands in the dermis secrete sweat through pores in the skin's surface

The eccrine sweat gland, which is controlled by the sympathetic nervous system, regulates body temperature. When internal temperature rises, the eccrine glands secrete water to the skin surface, where heat is removed by evaporation. If eccrine glands are active over most of the body (as in… Read More

Jan 21, 2025 · The clear stratification of the epidermis is the result of well-defined changes in its major constituent cells—the keratinocytes, or corneocytes—as they move peripherally from the basal layer, where they are continuously formed by mitosis, to …