Different Types of Immune System

natural immunity

innate immunity

what is innate immunity

first line of defense

Nonspecific protection against foreign substances indiscriminately.

All cells but lymphocytes.

acquired immunity

adaptive immunity

What is adaptive immunity?

second line of defense that occurs after the body's exposure to pathogens

highly specific

creates memory cells for faster recognition during re-exposure

what is active adaptive immunity?

produced by your body after exposure to a disease or vaccine

what is passive adaptive immunity?

immunity generated from the transfer of antibodies or immune cells from an immune individual to a nonimmune one (ex: antibodies transferred from mother to child through breastfeeding)

what cells are involved in the innate immune system

Neutrophils, eosinophils, basophils, mast cells, monocytes, macrophages, dendritic cells, and natural killer (NK) cells.

what cells are involved in the adaptive immune system

B lymphocytes and T lymphocytes.

neutrophils

A type of white blood cell that engulfs invading microbes and contributes to the nonspecific defenses of the body against disease.

eosinophils

a white blood cell containing granules that are readily stained by eosin.

basophils

A circulating leukocyte that produces histamine.

mast cells

Cells that release chemicals (such as histamine) that promote inflammation.

monocytes

An agranular leukocyte that is able to migrate into tissues and transform into a macrophage.

macrophages

Found within the lymph nodes, they are phagocytes that destroy bacteria, cancer cells, and other foreign matter in the lymphatic stream.

dendritic cells

specialized white blood cells that patrol the body searching for antigens that produce infections

natural killer cells

A type of white blood cell that can kill tumor cells and virus-infected cells; an important component of innate immunity.

helper t cells

Activate macrophages, B cells and T cells.

t cells

Cells created in the thymus that produce substances that attack infected cells in the body.

b cells

produce antibodies