The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies.People with type O have both anti-A and anti-B antibodies.BO blood type system. The ABO system consists of A, B, AB, and O blood types. People with type A have antibodies in the blood against type B. People with type B have antibodies in the blood against type A. People with AB have no anti-A or anti-B antibodies. People with type O have both anti-A and anti-B antibodies.
Staying in one position for any length of time increases the risk that the lower legs, feet, or hands will swell because body fluid will normally move down a limb from the effects of gravity. Swelling can also be caused by heat-related problems, such as heat edema from working or being active in a hot environment.
Carpal tunnel syndrome occurs when pressure is placed on the nerve, according to MayoClinic.com This pressure, which is usually due to inflammation, causes numbness in the hands and fingers, pain and weakness of the hand. The cause of carpal tunnel syndrome can be arthritis, diabetes, hormone disorders or repetitive use of the hand and wrist.