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. Author manuscript; available in PMC: 2014 Jul 14.
Published in final edited form as: Anat Rec (Hoboken). 2013 Sep 17;296(11):1768–1774. doi: 10.1002/ar.22783

Fig. 3.

Fig. 3

Distribution of glands along and around the trachea. A: Longitudinal distribution. Tracheas were split open longitudinally, cut into six equal lengths, stained with PAS, and the percentage of the area occupied by glands determined. Section 1 is most cephalad, and section 6 is most caudal. Results for one trachea. Exactly similar results were obtained on two other tracheas. B: Circumferential distribution. Results for anterior-most sixth of two tracheas, indicated by different symbols. Values at 30° and 60° are the averages of both sides.