Natural immunity
Cellular immunity
Capillary permeability increases (diapedesis)
Formation of exudate
Acquired immunity
Natural / Nonspecific immunity
Humoral immunity
Nonspecific - second line of defense
Natural immunity - Internal
Inflammatory reponse
Factors that affect defense mechanisms
Dilation of capillaries (hyperemia)
Chemotaxis
Natural immunity - External
Stomach acid, mucus linings, tears, ear wax..
Born with the ability to resist infections / normal bodily functions
Allows white blood cells to leave the blood and travel to the injured area
Chemicals are released which cause phagocytic white cells to migrate to the area
Removal of foreign substances (antigens) by specialized cells (phagocytosis)
Derived from plasma, containing antibacterial substances, phagocytic cells, and any present antibiotics
First line of defense against infection (external and internal)
Redness, swelling, heat, pain
Age, hormones, drugs/chemicals, malnutrition, fatigue/stress, genetic factors
Requires exposure to a pathogen, recovery usually results in a lifelong immunity
Structural barriers to keep infectious agents out of the body (skin, cilia, etc)
Inflammatory response
to increase blood flow to area
Substances (antigens) in the blood are provided protection from microorganisms
