Figure 4.1 is a graph showing changes in volume of air during Inspiration and expleation in the respiratory organs of a person.
a) Which letter shows the process of inspiration taking
place?
() Name the activities taking place during stages 1,2
and 3.
(b) Explain why there is an increase in volume during stage 3
(c) Describe four changes that will take place in the thorax
during inspiration in order to facilitate the increase in
volume during stage 2.
1.
2.
3.
4.
[Total:9)