Fig. 2.

Complexity of nasal cavity illustrated through the dimensionless coefficient, ${\delta }^{\ast }={\gamma }^2/A,$ where γ is the nasal mucosa perimeter and A is the cross-sectional area, as a function of the scaled position along the nose for the mature reindeer (thick solid line), its reference case (thin solid line), the newborn reindeer (thick dashed line) and its reference case (thin dashed line)