To start the response, the Macrophage cell encounters a pathogen floating in the blood and eats it.
Hello there! It's Bill Nye and I'm here to teach you all about the Humoral response part of the Acquired immune system!
Helper T cell
Next, the Macrophage presents the antigens to the helper T cell.
Antigens
Helper T cell
The Helper T cell interacts with the antigens, then activates the B cells.
B cells
The Memory B cells remember the antigen so that they can fight off the pathogen faster the next time they encounter it.
B cell
The B cells then differentiate into Plasma B cells and Memory B cells.
Memory B cell
Plasma B cell
Antibodies
Plasma B cell
The antibodies tagging the pathogen's antigens prevent the pathogen from entering a cell and it makes it easier to find and destroy using the macrophage.
Pathogen
While the Memory B cell does it's job, the Plasma B cell is tagging the pathogen with antibodies.
In the end, everything comes back to the macrophage which eats the pathogen destroying it.