The volume of air within stiff, cartilaginous conduits of a respiratory system that are devoid of respiratory epithelium, like the trachea and bronchi, is classified as: A.) pleural pressure B.) tidal volume (TD) C.) anatomical dead space (VD) D.) additional surface areas for gas exchange E.)vital capacity (VC) A.) pleural pressure B.) tidal volume (TD) C.) anatomical dead space (VD) D.) additional surface areas for gas exchange E.)vital capacity (VC).