What the immune system does. The immune system protects the body against illness and infection caused by bacteria, viruses, fungi or parasites. It is really a collection of reactions and responses that the body makes to damaged cells or infection. So it is sometimes called the immune response.
At that point the family name she used to use, the family name of her father, is called her maiden name because it was her name when she was a maiden. Your mother's maiden name is usually the surname (or family name) of your maternal grandfather. Traditionally in the English-speaking world, a child uses the family name of the father. Also traditionally, when a woman marries, she takes the family name of her husband. At that point the family name she used to use, the family name of her father, is called her maiden name because it was her name when she was a maiden. <br /><br /> Your mother's maiden name is usually the surname (or family name) of your maternal grandfather.
Mother's maiden name refers to the mother's unmarried name -- usually the surname before she married. Mary Jones married John Smith, so Jones was her maiden name and she is now Mrs John Smith (alternatively Mary Smith). Mother's maiden name was her real name before she married daddy. When they married, mummy took daddy's surname and that is now her new real name.