<Tr> <Td> Skin </Td> <Td> Sweat, desquamation, flushing, organic acids </Td> </Tr> <Tr> <Td> Gastrointestinal tract </Td> <Td> Peristalsis, gastric acid, bile acids, digestive enzyme, flushing, thiocyanate, defensins, gut flora </Td> </Tr> <Tr> <Td> Respiratory airways and lungs </Td> <Td> Mucociliary escalator, surfactant, defensins </Td> </Tr> <Tr> <Td> Nasopharynx </Td> <Td> Mucus, saliva, lysozyme </Td> </Tr>

Which of the following is not part of the body’s innate (non-specific) defense system