What is the purpose of tears and sweat in the context of protecting the body?

The primary purpose of tears and sweat in the context of protecting the body is to remove pathogens. Tears help to wash away potential irritants and microorganisms that may enter the eyes, providing a protective mechanism against infections. They contain enzymes like lysozyme that can break down cell walls of bacteria, further contributing to their antimicrobial properties.

Sweat, on the other hand, serves multiple protective functions. It helps to maintain skin hydration, regulates body temperature, and contains antimicrobial peptides that can inhibit the growth of certain pathogens. Additionally, the act of perspiration itself can flush out contaminants and microorganisms from the skin’s surface, offering a physical barrier to infection.

Both tears and sweat are essential components of the body's innate immune response, promoting hygiene and reducing the risk of infections. This illustrates their vital roles in the first line of defense against pathogens.