It's amazing sometimes what you stumble across when you are searching the web for something else. I wasn't even searching for something horse related when I came across this set of photos. Having watched a horse being 'scoped' this passed spring, where a veterinarian passed a tiny camera through the horses nasal passages to its esophageal passage, it was interesting to retake part of the 'tour;. These cross sections of a horse's head show the complex structure of mouth, sinus and orbital regions.