PATHOLOGY

Detailed explanation-1: -Protection offered by the skin and mucous membranes All outer and inner surfaces of the human body a key part of the innate immune system. The closed surface of the skin and of all mucous membranes already forms a physical barrier against germs, which protects them from entering.

Detailed explanation-2: -The skin and mucous membranes provide a nonspecific first line of defense against invaders entering through the skin or through openings into the body.

Detailed explanation-3: -Typically, mucous membranes are coated with secretions that fight microorganisms. For example, the mucous membranes of the eyes are bathed in tears, which contain an enzyme called lysozyme that attacks bacteria and helps protect the eyes from infection.

Detailed explanation-4: -Skin is a barrier that serves as one of the body’s first lines of defense against harmful microbes. Specialized immune cells within skin tissue help to fight invading organisms. Yet the skin hosts diverse communities of beneficial bacteria, collectively known as the skin microbiota.