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. 2015 Sep 8;10(9):e0136284. doi: 10.1371/journal.pone.0136284

Fig 9. Composition of the submucosal tissues at histology.

Fig 9

Values are presented as percentage of the submucosal tissue occupied by ECM and ASM for each airway. N = 14 for controls and 20 for heaves. On average, a greater percentage of submucosal thickness was occupied by ASM in smaller airways of horses with heaves compared to controls. This tendency reverses as the airway size increases. However, as the submucosal thickness is increased in horses with heaves compared to controls, the absolute thickness of the ASM layer still remains greater in horses with heaves than in controls for airways with Pi<26mm.