Question

how cockroaches and mosquitoes are able to breathe in space?​

Answer 1

Answer:

Roaches don't breathe through their mouths. Instead, oxygen enters their bodies through small openings located on their thorax. These breathing holes are called spiracles. The oxygen travels throughout a system of trachea tubes, and is distributed to all parts of the insect's body.

Answer 2

Answer:

Tracheal respiration in Cockroach

A new study on cockroaches suggests the insects reduce their breathing to conserve moisture. ... Their respiratory system is highly efficient but there are no lungs. Instead, the insects draw in air through external valves called spiracles and transport the air directly to the cells via tubes called trachea.