Vascularization of the vomeronasal organ in the dog

Blood is led to the vomeronasal organ via the large palatine and sphenopalatine arteries and returns via the veins of the same names. Under the microscope, transverse sections exhibit large numbers of veins and lymph vessels and relatively few arteries. The prominent veins are characterized by their thick, muscular wall; the arteries are smaller in proportion and likewise muscular, while the typical lymph vessels are dilated in sections of organ prepared by injection of latex or Araldite. Due to the presence of erectile tissue, the arrangement of the parenchyma depends on the functional state of the organ.