There are different types of
blood because each red
blood cell has special chemical markers called antigens. There are also antibodies (cells that fight particular groups of antigens) in the
blood has no antigens at all, but it has both anti-A and anti-B antibodies.
blood has both A and B antigens, but no antibodies.
The Rhesus factor is also used to categorize
blood as either Rhesus positive (+) or Rhesus negative (-). If
blood is Rhesus positive, this means it contains the Rhesus antigen (and if it does not, the
blood is Rhesus negative). Any
blood type can be Rhesus positive or negative: for example, you can be A+ or A-.
blood type is inherited from your biological parents, in a similar way to eye or hair color. It is important to match
blood groups when carrying out
blood transfusions, so that the person's antibodies do not try to fight the new
blood and vice versa.
NOTICE: The information provided on this site is not a substitute for professional medical advice,
diagnosis, or treatment. Never delay or disregard seeking professional medical advice from your
physician or other qualified health provider because of something you have read on Wellsphere.
If you have a medical emergency, call your doctor or 911 immediately.