Immunity is resistance to disease resulting from the presence of foreign substances or __________________ in the body. When this resistance is provided by antibodies released to body fluids, the immunity is called _____________ immunity. When living cells provide the protection, the immunity is referred to as ______________ immunity. The major actors in the immune response are two types of lymphocytes, the ___________ , which are aided by phagocytic macrophages. Because pathogens are likely to use ___________ as a means of getting around the body, ___________ and other lymphatic tissues / organs (which house the immune cells) are in an excellent position to detect their presence.