Figure 5

3D models of the sinonasal channels and SMR, SCV and SMC of three different horses. All pictures show the right side in a lateral view. In a 8-year old Warmblood gelding (A), the rostral sinonasal channel was in single communication with the SMR. In another horse (B), a 7-year old Thoroughbred gelding, the rostral sinonasal channel was in communication with the SMR and the SCV. Whereas, in a 26-year old Warmblood stallion (C), the rostral sinonasal channel was in single communication with the SCV. Coloured structures: bright green: SMR, dark green: SCV, red: SMC, blue: sinonasal channel system.