Fig. 6

Histology of the middle nostril and hair-bearing surface of the muzzle in the present case (a) and the mucosal surface of the muzzle and nostrils in a normal, age-matched calf (b). a The tissue comprises normal skin structures, including nasal glands and subcutaneous connective tissues (H&E, bar = 250 μm). b Compared with the present case, the glandular lobes are larger in the middle nostril of the age-matched calf (H&E; bar = 100 μm)