Question

The humoral immune system defends mostly against bacteria and viruses in the-

• A. Body fluids
• B. Regions beneath the skin
• C. Internal organs
• D. Digestive tract

Answer 1

The correct option is A Body fluids

Many of the bacteria that cause infectious disease in humans multiply in the extracellular spaces of the body, and most intracellular pathogens spread by moving from cell to cell through the extracellular fluids. The extracellular spaces are protected by the humoral immune response, in which antibodies produced by B cells cause the destruction of extracellular microorganisms and prevent the spread of intracellular infections.
So, the correct answer is- body fluids.