The B cells rush to the scene, but only the B cells with the right antibodies can help.
Ed steps on a rusty nail, and bacteria pathogens enters his blood stream.
Ow! I Stepped on a rusty nail!
The antibodies attach themselves to the antigens present on the bacteria cells.
Inflammation occurs and blood rushes to the area of the infection in order to fight it. T helper cells, macrophages, and other blood components rush to where the infection is.
The macrophages eat some of the bacteria, but can't get it all. Only some bacteria is destroyed.
The macrophages find the bacteria with the antibodies attached to them and put to death the bacteria by way of phagocytosis.
The T helper cells know that there's a problem and they send cytokine for B cells.
The macrophages show the T helper cells what they ate up.
When a match is found, the B cell makes multiple copies of the antibody it has on the surface.
Once the antibodies are attached to the antigens on the bacteria cell, the cytokine is sent to get more macrophages.
Meanwhile, the B cell that recognized the antigen is replacing and making memory cells with the same antibody on them so that if this bacteria comes back they can recognize it more quickly and destroy it.