Please help I don't have much time to answer this question! Imagine that a potential pathogen has been able to get through the skin, the first line of body defense What three general defense mechanisms can the body use as a second line of defense to prevent the pathogen from causing a major infection?

The immune system's three lines of defense include physical and chemical barriers, non-specific innate responses, and specific adaptive responses.

all soils contain mineral particles, organic matter, water and air the combinations determine the soil's properties – its texture, structure, porosity, chemistry and color. soil is made up of different-sized particles. sand particles tend to be the biggest.