Question

13. In insects the tracheal system consists of a series of tubes called as trachea which open out through
small apertures called as
(1) dorsal pores
(2) ventral pores
(3) spiracles
(4) ostia​

Answer 1

Explanation:

In insects the tracheal system consists of a series of tubes called as trachea which open out through

small apertures called as

(1) dorsal pores

(2) ventral pores

(3) spiracles

(4) ostia

Answer 2

Answer:

spiracle

Explanation:

Spiracles are respiratory openings found on the thorax and abdomen of insects. The spiracles are connected to trachea - tubes within the insect's body. Air enters the trachea via the spiracles and the oxygen then diffuses into the insect's body.