What is the main characteristic of the dead layer of the epidermis?

The dead layer of the epidermis, primarily composed of flattened and keratinized cells, plays a crucial role in maintaining skin integrity and hydration. One of its key characteristics is its function as a sealant, which helps prevent moisture loss from the underlying layers of the skin. This barrier is essential for protecting the body from environmental factors such as pathogens and harmful substances.

The keratin present in this layer offers a waterproofing effect, contributing significantly to the skin's ability to retain moisture. This is particularly important as it helps to keep the skin hydrated and maintains its overall health. By serving this sealing function, the dead layer effectively supports the skin's role as a barrier between the internal body and the external environment.