How does skin protect inner parts from diseases?

The skin acts as a physical barrier, preventing pathogens such as bacteria and viruses from entering the body. It produces antimicrobial peptides and secretes oils and sweat that create an inhospitable environment for microbes. Additionally, the skin's immune cells can detect and respond to potential threats, initiating an inflammatory response to help fend off infections. Overall, the skin plays a crucial role in the first line of defense against diseases.