epidermal
All of the following are human organ systems except ___________.
The epidermis is the outermost layer of the skin, which functions as the body’s first line of defense against the outside environment. It is composed of multiple layers of flat, scale-like cells called keratinocytes that are rich in the protein keratin, which provides strength and water-resistance to the skin. The epidermis also contains specialized cells called melanocytes that produce the pigment melanin, which helps protect the skin against the harmful effects of UV radiation from the sun.
The epidermis is constantly renewing itself, as old keratinocytes are shed from the surface and replaced by new ones from the basal layer at the bottom of the epidermis. This process is regulated by several factors, including hormones, growth factors, and cytokines. The epidermis also contains a network of nerves and sensory receptors that allow us to feel touch, pressure, temperature, and pain.
Overall, the epidermis plays a crucial role in maintaining skin health and function, and preventing infection and injury to the body’s tissues.
More Answers:
The Nervus Intermedius: Functions, Symptoms, and Possible LesionsUnderstanding the Crucial Role of Homeostatic Mechanisms in Maintaining Optimal Health and Well-being
Discovering the Intricacies of the Digestive System: How it Breaks Down Food and Absorbs Nutrients for Optimal Health and Well-being.