Tracheae of cockroach and mammal are similar in having (a) paried nature (b) noncollapsible walls (c) ciliated inner lining (d) origin from head
Option B Tracheae act as passage of air during respiration in both cockroach and mammals. In cockroach, the cuticular lining is spirally thickened forming taenidia which prevents the tracheal tubes from collapsing. In mammals, cartilaginous rings supporting the walls of the tracheae prevent their collapsing.
