Question

Common feature of human and insect trachea is
a. Non collapsible wall
b. Supportible rings
c. Ectodermal origin
d. Endodermal origin

Answer 1

Correct Answer: B

Solution :

A tracheal tube in insects develops as the imagination of the ectoderm. To prevent its collapse under pressure, a thin reinforcing wire' of cuticle called the taenidia winds spirally through. it's membranous wall. The absence of taenidia in certain parts of the trachea allow the formation of collapsible air sacs.