Macrophages

“Macrophages (and their precursors, monocytes) are the ‘big eaters’ of the immune system. These cells reside in every tissue of the body, albeit in different guises — such as microglia, Kupffer cells and osteoclasts — where they engulf apoptotic...

Blood Types (ABO)

Our blood type refers to the antigens we have on our RBCs. If we have A and B antigens on our RBCs, then our blood type will be AB. If we have only A or B or no antigens, then our blood type will be A or B or O respectively. Then there is also the Rh (D antigen) which...