Blood air to all of the cells of the body, and venous blood carries carbon dioxide, a waste product of metabolism by cells, to the lungs to be exhaled. However, one exception includes pulmonary arteries, which contain the most deoxygenated blood in the body, while the pulmonary veins contain oxygenated blood. Additional return flow may be generated by the movement of skeletal muscles, which can compress veins and push blood through the valves in veins toward the right atrium. The blood circulation was famously described by William Harvey in 1628. In vertebrates, the various cells of blood are made in the
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