A. Exretion B. Protection C.Filtration D.Sensation E.Heat _____________1 It is the outermost barrier of the body against injury and infection. _____________2 It contains receptors and nerve endings so one can feel pain,heat,touch, and pressure. _____________3 The sweat glands release water through the pores when the temperature of a person rises . _____________4 The cilia in the nose trap dust particles in the inhaled air . _____________5 Excess salts and urea are released out of the body in the form of perspitation.