Blood collection is a medical procedure used to obtain a sample of blood for testing or donation. This process typically involves using a sterile needle to draw blood from a vein, usually in the arm. The collected blood is then placed in special tubes that help preserve it for various laboratory tests, such as checking for diseases or monitoring health conditions. There are different methods of blood collection, including venipuncture, capillary blood collection, and arterial blood sampling. Each method is chosen based on the specific needs of the patient and the type of tests required. Proper techniques and hygiene are essential to ensure safety and accuracy in the results.