Emissary veins passing through the foramen ovale, jugular foramen, foramen lacerum, and hypoglossal canal. Because the emissary veins are valveless, they are an important part in selective brain cooling through bidirectional flow of cooler blood from the evaporating surface of the head. In general, blood flow is from external to internal but the flow can be altered by increased intracranial pressure. A type of emissary vein goes through the sphenoidal emissary foramen inferior to the zygomatic arch with the cavernous sinus on the inside of the skull. This is an important route for spread of infection because cranial nerve VI and the
The Blood Book of "Immanuel's Veins", as it contains both new and different content than what was mentioned in "Immanuel's Veins", and is missing certain other details. A man whom Toma called Saint Thomas the Beast Hunter is implied to be the one who penned Toma's Blood Book. Ba'al's Blood Book was also mentioned briefly in Dekker's novel "Green", as it was compiled only about a year before "Green" took place. "The Blood Book" was first rumored by Dekker on his old forums sometime in 2008, before the release of "Green". There he spoke of a pair of journals, known as the "Blood