The epidermis, specifically its outermost layer called the stratum corneum, acts as the primary barrier protecting the body from external factors like bacteria, chemicals, and temperature changes.
Here's how the skin protects the body:
- Barrier against invasion: The skin forms a physical barrier, preventing bacteria, viruses, and other harmful microorganisms from entering the body.
- Temperature regulation: The skin helps maintain body temperature by regulating heat loss and heat gain through sweating and blood vessel dilation or constriction.
- Protection from UV radiation: Melanin in the skin absorbs ultraviolet radiation from the sun, protecting deeper tissues from damage.
- Sensation: The skin contains sensory receptors that allow us to feel touch, pressure, temperature, and pain.
- Water balance: The skin prevents excessive water loss from the body.
- Immune response: The skin contains cells of the immune system that help fight off infections.
