A blood transfusion is a medical procedure that involves transferring blood or blood components from one person to another. This process is often necessary for patients who have lost blood due to surgery, injury, or medical conditions like anemia. The donated blood is carefully matched to the recipient's blood type to prevent complications. During a blood transfusion, the donor's blood is collected and stored in a sterile bag. The healthcare provider then administers the blood through an intravenous (IV) line. Monitoring is essential throughout the procedure to ensure the recipient's safety and to watch for any adverse reactions.