WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY WILL & DENI MCINTYRE / SCIENCE PHOTO LIBRARY
Blood donation. Volunteer donating blood. The blood is being taken from a blood vessel in the arm and is being collected in the bag at lower left. The volunteer can assist the flow of blood by repeatedly squeezing and releasing the grip in their hand. About 0.5 litres of blood, of the 4.5-6 litres in an average adult, is collected during a donation. The bag contains an anticoagu- lent to prevent the blood from clotting. After donation, the blood is then examined to ensure that it is free from diseases such as hepatitis before it is cleared for clinical use. The whole blood is often separated into its separate components to treat particular medical conditions.
Model release not required. Property release not required.