Veins are vessels designed to collect and return blood, including deoxygenated hemoglobin, from tissues to the heart. Veins and the venous vascular system can be divided in to three separate systems depending on anatomical relationships and function....

William Harvey's classic work on the circulatory system in the seventeenth century first defined the function of veins. Through dissections and experimentation, Harvey was able to illustrate that veins are responsible for bringing blood to the heart....

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In the circulatory system, a vein is a blood vessel that carries blood toward the heart. The majority of veins in the body carry low-oxygen blood from the tissues back to the heart; the exceptions being the pulmonary and umbilical veins which both carry...

WORCESTER -- It's early afternoon, a perfect spring day. Outside the UMass Medical Center, employees savor the last of their lunch break, faces tipped toward the sun, legs splayed on the grass. Inside, in operating room 3, Evelyn Kolat, 74, lies inert, dwarfed...

IN THE SAME VEIN The network of blood vessels in a human being is not only extensive, it's also finely engineered. Some anatomists say that, placed end to end, the vessels would stretch 60,000 miles. As for the engineering, the British biologist Cecil D....

An overweight inmate was executed by injection Thursday after a delay of more than an hour while prison medical staff struggled to find suitable veins in his arms.The execution of Christopher Newton, who had killed a cellmate in 2001 and insisted on the death sentence,...

An execution was delayed more than an hour Thursday while prison medical staff struggled to find suitable veins in the condemned man's arms _ the second time that has happened in Ohio in little more than a year.The execution team stuck Christopher Newton at least...