IMMUNE SYSTEM

IMMUNITY

ability of the body to fight infection by producing antibodies or killing the infected cell

IMMUNE RESPOND

protective reaction which keep the body in stable state

IMMUNE SYSTEM

system that responsible in maintaining homeostasis by recognizing harmful organism and produce suitable respond

Two types of immune responds:

i. nonspecific - fight any types of antigen ( 1st line n 2nd line body defense)

ii. specific - fight particular invader (3rd line body defence)

NONSPECIFIC

4 types:

i. barriers to entry - skin,mucus,tears,sweat

ii. phagocytic (leukocytes) and natural killer cell

iii. inflammatory reaction - caused by histamine, prostaglandin, chemokines 

iv. antimicrobial protein - lysozyme, complementary system, interferone 

SPECIFIC

relate to lymphatic system

Primary lymphatic organ 

- place where lymphocytes produced

Secondary lymphatic organ 

- place where lymphocytes bind to antigen (bacteria,virus that cause harm to organism)

The two basic types of leukocytes are:

1. phagocytes, cells that chew up invading organisms
2. lymphocytes, cells that allow the body to remember and recognize previous invaders and help the body destroy them

Types of lymphocytes:

i. T cell

ii. B cell

when antigen interact with lymphocytes, lymphocytes will actived and differentiate into:

i. memory cell

ii. effector cell