Blood collection refers to the process of obtaining blood samples from individuals for diagnostic, therapeutic, or medical purposes. It is typically carried out using various devices such as needles, syringes, vacutainer tubes, and blood bags. Blood collection is essential for routine health check-ups, disease diagnosis, monitoring medical conditions, and administering treatments like blood transfusions. This process plays a critical role in healthcare, ensuring accurate diagnosis, treatment efficacy, and the management of chronic illnesses and traumatic injuries.