Insect Gas Exchange

  • Created by: Aleena
  • Created on: 27-10-18 12:33

Gas Exchange: Insects

No blood system to deliver oxygen to cells

instead use air containing oxygen is delivered directly to all the tissues by a system of tubes called Tracheae (singular:trachea).

There are a series of opening along each side of the insects abdomen- each segment has a pair spiracles (openings)

Insect makes pumping movements with its thorax and abdomen-when body expands, air sucked thru spiracles into tracheae

air then passes through  series of smaller and smaller tubes- tracheoles to reach respiring tissues

walls of larger tracheae strengthened by rings of chitin

at end of each tracheole there's a small amount of tracheal fluid- the fluid allows oxygen/carbon dioxide to dissolve and diffuse 

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