Basophils are a type of white blood cell that play a crucial role in the immune system. They are part of the body's defense mechanism and are involved in inflammatory responses. Basophils contain granules filled with chemicals, such as histamine, which are released during allergic reactions and infections. These cells are the least common type of granulocyte, making up less than 1% of the total white blood cell count. Basophils help to protect the body by releasing substances that can attract other immune cells to sites of infection or injury, thereby enhancing the overall immune response.