List FOUR characteristics of respiratory surfaces. – NABTEB QUESTION by Sunday | Sep 20 | NABTEB QUESTIONS | 0 comments Thin wet/moist vascularized; ciliated, smooth. Users Also Read These:Write the respiratory structure of amoeba, five day…Which of the following colours of surfaces will…The surfaces of conveyor belts are made rough so as to?The limiting frictional force between two surfaces…State FOUR physical characteristics in man which…