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Did You Know?

Information about Blood

  • An average adult has between 10 and 12 pints of blood
  • 7% of a person's body weight is made up of blood
  • Human blood travels 60,000 miles per day on its journey through the arteries, arterioles and capillaries and back through the venules and veins
  • Blood carries oxygen and nutrients to all parts of the body
  • Blood carries carbon dioxide and other waste products back to the lungs, kidneys and liver for disposal
  • There are about 1 billion red cells in two to three drops of blood
  • View the Current Blood Supply here


Giving Blood


Blood Group Distribution Facts

  • The most common blood group in Ireland is O positive (47% of the population)
  • The rarest blood group in Ireland is AB negative (1% of the population)
  • The most common blood group is O, accounting for about 46% of the world's population. However, in some areas other blood groups predominate, in Norway for example, type A is the most prevalent
  • People in the West of Ireland are predominantly of blood group O
  • There is a higher concentration of Group A blood in counties which historically received Viking, Anglo Norman and English population settlements
  • There are more people with Rhesus negative blood on the East coast than the West
  • Read about Blood Groups here


Blood Transfusions

  • Read about the Blood Donation Process here
  • One in four people will need a blood transfusion at some point in their lives
  • Over 1,000 Irish people receive transfusions every week in Ireland
  • Approximately 70,000 patients will have transfusions in Irish hospitals this year
  • The IBTS supplies 71 hospitals in Ireland with blood and blood products 365 days a year
  • One car accident victim may require up to 30 units of blood, a bleeding ulcer could require anything between 3-30 units of blood and a coronary artery bypass may use between 1-5 units of blood
  • A unit of blood lasts for just 35 days

National Blood Centre, James's Street, Dublin 8.       Tel: 00 353 1 4322800       Fax: 00 353 1 4322930