Immune system/antibodies

what is your immune system

A complete network of cells and proteins that defend body from pathogens

what are pathogens

A foreign substance that attacks body like bacteria, virus, fungi, chemicals

What does your bone marrow do

Primary cite for different blood type productions including white blood cell and the maturation of the T/B cells

Thymus gland

Trains and differenciates T/B cells

Lymph nodes

Filters lymph fluid, stores T/B cells

Spleen

Filters blood borne pathogens and recycles old blood cells and destroys bacteria with the help of macrophages

What do they do:

-Neutrophils:

-Lymphocytes:

-Macrophages&monocytes:

-first responder to engulf bacteria

-target specific cells to produce antibodies

-large cells to destroy bacteria

First line of defense

Mucus, skin, saliva, tears, stomach acid, good gut bacteria

Second line of defense

Macrophages that target all invaders(not target specific)

Third line of defense

T and B cells that target certain types of antigens and have specific antibodies to fight them off (target specific)

How does T and B cells play an important role in combating antigens

If a pathogen returns into the body, the T and B cells have memories of it, so they recognize it quickly, multiply and form specific antibodies to help fight off pathogens

What is an antigen

A substance that the body recognizes at foreign (when there’s a marker on the pathogen)

What is an antibody

Proteins that fight off antigens