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:Which of the following surfaces will absorbs radiant…Which of the following vertebrae provide…Which of the following surfaces will radiate heat…State FOUR characteristics of clay soil. - NABTEB QUESTIONThe limiting frictional force between two surfaces…