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Blood Facts



picture from CELLS alive

Blood is a living tissue composed of blood cells suspended in plasma.

The cellular elements, red blood cells, white blood cells and platelets -- make up about 45% of the volume of whole blood. Plasma, which is 92% water, makes up the remaining 55%.

Blood accounts for about 7% of a person's weight. An average sized man has about 12 pints of blood, and an average sized woman has about 9 pints. Your body immediately begins replacing the donated blood volume after you donate blood, so you can safely donate as often as 6 times a year.

After donation, Blood Center laboratory personnel separate whole blood into its components:

Plasma - Plasma is 92% water, miscellaneous elements and 7% protein from which derivatives are made. Cryoprecipitate (which contains the antihemophilic factor) and fresh frozen plasma are given to patients who have hemophilia and other bleeding problems.

Platelets - Platelets act to induce clotting and control bleeding.



Red Blood Cells
- Red blood cells transport oxygen and nutrients to the tissues and remove carbon dioxide and waste. Red blood cells are indicated for more than 70% of all transfusions. Accident victims, patients with ulcers and patients undergoing surgery use red blood cells.  

Download 56 Facts about Blood and Blood Donation (pdf file)

For more information about blood visit America's Blood Centers Web Site. Special thanks to Jim Sullivan and CELLS Alive for the use of graphics and pictures they supplied.


The Blood Center of New Jersey
45 South Grove Street
East Orange, New Jersey  07018
1-800-NJBLOOD
1-973-676-4700

Copyright 2001 by The Blood Center of New Jersey. All rights reserved.