To give Blood. A normal Blood donation is comprised of a little less than one U. S. pint. Specific components of whole Blood can also be donated. There are 3 basic categories of Blood donation. The first is Voluntary Blood donation; a process of Blood donation where the donor donates Blood without accepting in return any consideration in cash or in kind from any source. The second is Exchange/Replacement Blood donation; a process where a person donates Blood for his/her family members or relatives or friends, and takes the Blood after it is tested and/or take the same unit of Blood from the Blood Bank’s stock in exchange for the donated Blood. The third is Autologous Blood donation, where an individual donates Blood for ones own use or reuse.