| MadSci Network: Medicine |
Before blood is given to a patient all the white blood cells are filtered out. These are the only cells in the blood which contain nuclei so no donor DNA is transferred to the host. White cells are larger than red cells, about 10 micrometres in dia. and are less numerous, between 7 and 10 x 10 to the power of 9 in number. Hope this is OK H
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