1 Gently rub a pumice stone back and forth across the affected area for three to five minutes and then pat dry your feet. 2  Dip a cotton ball in castor oil and place it on the corn. Secure it with tape and leave it on overnight.  The next morning, remove the bandage and apply castor oil several times a day.
Hepatic veins are unusual in that they do not have valves. Hepatic veins are blood vessels which transport the liver's deoxygenated blood and blood which has been filtered by the liver (this is blood from the pancreas, colon, small intestine, and stomach) to the inferior vena cava.
It goes back to your heart. Superior vena cava is a vein therefore, it transports blood back to the heart. If you mean to ask where does the blood come from that passes through the superior vena cava, then the answer is from the head and arms. Was this helpful? Let the contributor know!