Question

what are the physical barriers of innate immunity?

adaptive immunity and t-cells

lymph nodes and spleen

antibodies and antigens

skin and mucous membranes.

digestive enzymes and bile

Explanation:

Innate immunity's physical barriers are the first - line defenses. Skin acts as a physical shield, and mucous membranes (e.g., in respiratory, digestive tracts) trap pathogens. Adaptive immunity (with T - cells) is a specific, acquired response. Lymph nodes and spleen are part of the lymphatic/immune system but not physical barriers. Antibodies (adaptive) and antigens (foreign substances) are not physical barriers. Digestive enzymes and bile are chemical defenses (not physical).

Answer:

Skin and mucous membranes.