All multicellular organisms have mechanisms for drawing oxygen-rich air (or water) into their bodies and removing carbon dioxide-rich air (or water).
A closer look at insect breathing systems makes it easier to appreciate the functions of the more familiar human ventilation system. A detailed study of human ventilation involves the use of a spirometer.
Modelling the human ventilation system
Make a simple model of the ventilation system. Investigate the effect of using tubes of different diameters to model the effect of bronchoconstriction in asthma.
Study the external features of mammalian lungs, then dissect the air pipes and spongy tissue to discover their structure and properties.
Using a spirometer to investigate human lung function
Use a spirometer to investigate key features of human lung function (or simply read about how they work) and interpret spirometer data.
Dissection of the ventilation system of a locust
Dissect a locust to observe the organs within the animal and the anatomical relationships between them.