Anatomy: Immune System and Immunity

immune system

-divided into innate and adaptive

-both work together to kill pathogens and destroy damaged cells

organs and tissues of IS

-bone barrow: considered main organ b/c it makes all immune cells

-thymus: necessary for T lymphocytes to become mature/functional

-lymph nodes: act as filters/traps

-spleen: basically large lymph node that does blood filtering

-tonsils/adenoids: first line of defense

-liver: makes important proteins to be used

barrier system

-first step in fighting infection

-barrier as to not allow entry (ex: skin)

-tears, saliva, urine also part of barrier system

inflammatory response

-1st thing is acute inflammatory response: pain redness, warmth, loss of function, and swelling

innate immune system cells

-defense against pathogens called phagocytes

adaptive immune system

-have specific responses to an infection

-plasma cells make antibodies (ex: immunoglobulins)

-T cells important during cellular immunity

-when you get an infection, you have active immunity and passing it onto baby is passive immunity (temporary)