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.
1. I am confused regarding the presence of valves in the superior vena cava. The superior vena cava does not possess valves unlike inferior vena cava, which possesses Eustachian Valve.
For example, in the superior vena cava syndrome, the symptoms that result from compression of the large vein that carries blood down to the heart. The superior vena cava is located in the middle of the chest and is surrounded by rigid structures and lymph nodes.ena cava: The superior vena cava is the large vein which returns blood to the heart from the head, neck and both upper limbs.