ANATOMY

Detailed explanation-1: -Mucus secretion by goblet cells mediates delivery of intestinal material to dendritic cells. Goblet cells and their produced mucus is part of our innate immunity and intimately linked to the adaptive immune system.

Detailed explanation-2: -The innate immune system also includes mechanisms for involuntary removal of pathogens, such as sneezing, coughing, and vomiting. Adaptive, or acquired, immunity is not present at birth, responds more slowly to pathogens, and develops over time to defend against specific pathogens.

Detailed explanation-3: -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-4: -Innate immunity can be viewed as comprising four types of defensive barriers: anatomic (skin and mucous membrane), physiologic (temperature, low pH and chemical mediators), endocytic and phagocytic, and inflammatory.