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
Great cerebral vein nausea, visual defects, fatigue, disturbance of eye movements and pupillary reflexes, or coma. Thrombosis of the cerebral vein is often deadly but can be survived. Risk factors include oral contraceptives, pregnancy, and the postpartum period. Great cerebral vein The great cerebral vein is one of the large blood vessels in the skull draining the cerebrum of the brain. It is also known as the "vein of Galen", named for its discoverer, the Greek physician Galen. However, it is not the only vein with this eponym. The great cerebral vein is considered as one of the deep cerebral veins. Other deep