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.
What causes swelling in the ankles, legs and feet for people with COPD? People with chronic obstructive pulmonary disease (COPD) may have swelling in their ankles, legs and feet. This kind of swelling is not caused directly by the COPD patientâs chronic bronchitis or emphysema. Instead, complications of COPD called âpulmonary hypertensionâ and âcor pulmonaleâ often cause the swelling.