Re: How do insects breath? I'm just curious.Same with amoeba.

Hai,

Insects respire by means of an elaborate and efficient gas exchange system 
made of branching elastic tubes called tracheae...the whole system is called 
the tracheal system.It serves for the transport of oxygen aand carbon dioxide.
As air is brought in direct contact with tissues and cells, gas exchange 
is through diffusion. In aquatic insects, there are many other specialisations.

Now about respiration in amoeba:
As you may know, the amoeba has no special respiratory organs and no 
respiratory pigments, but there is a free exchange of gases by diffusion 
or osmosis through the general body surface (plasmalemma), which is 
permeable to the gases dissolved in water.

Is this clear????

Best wishes
Dr. (Mrs) Rajmohana