Figure 2
From: Anisotropic shrinkage of insect air sacs revealed in vivo by X-ray microtomography
Quantitative volumetric changes.
(a) Volume of the air sac as a function of time. In the first few seconds, the volumetric changes show an erratic pattern. Next, the volumetric changes come into a steady state and represent a periodic pattern within the seven full periods captured. The periods have small fluctuations with an average of 8.7 s. (b) Volumes of tracheal trunk 1–4 in the prothorax as a function of time. The volume of trachea 1 has a periodic change with a period of 11.5 s, while others show irregular change.
