Ok you have the basics now down.
There are 2 codes on this page


Here is some basic summarisation yap about the immune system from my notes

• The immune system is activated when an Antigen is detected. Antigens are things like viruses, fungi and proteins on bacteria, once an antigen attaches to an immune cell receptor the immune system is triggered and the body starts storing information on the germ that is causing issues so the adaptive can learn to generate ideal antibodies next time the body is attacked.
• The skin acts as a first line of defense stopping pathogens from going straight in, mucus saliva and tears all contain an enzyme that break down cell walls to protect openings.
• If a pathogen gets through and into the body they may stimulate increased blood flow to the area in return the body expands nearby blood vessels, releasing white blood cells called phagocytes which attempt to destroy the pathogen, this process can leave the area red, hot and swollen, this is called the inflammatory response.
• Sometimes the immune system will also release chemicals to increase the body's temperature, slowing or stopping the pathogens growth, this is a fever.
• During an attack the body stores information on the pathogen and remembers it so next time it attacks the body can respond faster and stronger with customised antibodies this is the purpose of the adaptive subsystem.
• Antibodies are specialised proteins which attack antigens and attract nearby cells to eliminate the pathogens. The main cells are lymphocytes which are composed of two types, B cells and T cells, T cells are created in bone marrow but mature in the thymus whilst B cells are produced and mature in the bone marrow.