Blood vessel prevent backflow as a result of a decrease in blood pressure as the blood passes through the circulatory system. There are various kinds of blood vessels: They are roughly grouped as "arterial" and "venous", determined by whether the blood in it is flowing "away from" (arterial) or "toward" (venous) the heart. The term "arterial blood" is nevertheless used to indicate blood high in oxygen, although the pulmonary artery carries "venous blood" and blood flowing in the pulmonary vein is rich in oxygen. This is because they are carrying the blood to and from the lungs, respectively, to be oxygenated. Blood
Tapping the Vein (comics) Tapping the Vein (comics) Tapping the Vein is a comic series of Clive Barker's short stories from "The Books of Blood" published by Eclipse Comics between 1989 and 1992. Eclipse Books would continue to adapt various Clive Barker short stories in the early 1990s after the "Tapping the Vein" series came to an end. These include the following: (A single volume featuring just "Dread" was also published) (A single volume featuring just "Revelations" was also published) Advertised, but never published was an adaption of "The Age of Desire" by P. Craig Russell and Tim Bradstreet, from "The Books of Blood