This oversized anatomical chart takes a close look at the Rhesus factor. The rhesus blood group system is used to blood type people and the Rhesus factor refers to those with the Rh D antigen on the surface of the blood cell. People are either Rh D positive or negative depending on whether or not they have been exposed tot he antigen. The Rhesus factor has anatomical and medical consequences such as hemolytic disease in newborns. This colorful anatomy chart is a great teaching tool! The Rhesus factor poster is delivered without wooden rods.