Answer:
The outermost layers of skin (the epidermis) form a protective barrier against environmental influences. The external layer of the epidermis - the stratum corneum or horn* layer - is made up of dead cells embedded in epidermal lipids and is covered by the hydrolipid film which includes the acid mantle.
The correct answer is "Epidermis."
The epidermis is the outermost layer of the skin and acts as a protective shield against germs and the environment. It serves as a physical barrier that helps prevent the entry of harmful microorganisms, toxins, and UV radiation. The epidermis also helps to regulate the loss of water and electrolytes from the body, maintaining the skin's hydration and overall integrity.
The epidermis consists of multiple layers, with the outermost layer consisting of dead skin cells called keratinocytes. These cells are constantly being shed and replaced by new cells from the deeper layers of the epidermis. This turnover process helps to maintain the skin's protective function.
In addition to its protective role, the epidermis is responsible for producing melanin, the pigment that gives skin its color. Melanin helps to protect the skin from the harmful effects of UV radiation by absorbing and dissipating it.
Overall, the epidermis is a crucial component of the skin and plays a vital role in keeping us safe from germs and the external environment.