VASCULARIZATION OF THE LABYRINTH MUCOSA IN THE ETHMOID BONE OF PIGS

The mucosa which covers the ethmoid bone of pigs and which represents most of the olfactory region is vascularized by arteries of intracrani al and extracranial origin. Blood is conducted to most of the mucosa o f the olfactory region, i.e. the mesethmoid and ethomoturbinates by br anches of a. ethmoidea interna, while branches of the a. sphaenopalati nae bring blood only to a smaller part of the mucosa of the oroventral and orodorsal parts. Branches of both arterial regions anastomose ver y intimately.