White+Blood+Cells+-+JF

=Introduction= toc The invaders have breached the city walls, but there is an army waiting for them. This army is specialized to take out this particular enemy. This is what happens in your body.

= **The Protector of your Body** =

White blood cells only job is to protect your body from foreign viruses. There are many different types of white blood cells. These include neutrophils, B cells, T cells, eosinophils, and dendritic cells. Dendritic cells tell other white blood cells what to do and where to go, like an officer on a battlefield. And that’s what your body is, a battlefield, between infections and your immune system. B cells and T cells release antibodies, which assist your body in killing bacteria. Antibodies act kind of like guns, by making it easier to kill viruses and bacteria. Basophils act like gatekeepers. They act like this because they control what goes in and out of the bloodstream. Neutrophils eat dead cells and bacteria. Eosinophils release toxins to kill the bacteria the same way an exterminator sprays poison to kill rats and bugs.

=Structure of a White Blood Cell=

There are four main types of white blood cells. These are neutrophils, dendritic cells, and B and T cells. Neutrophils have complex cytoskeletons.This helps them in many ways. For instance, this cytoskeleton helps with making chemotaxis. Chemotaxis call other white blood cells to the place where there are bacteria. In addition, the cytoskeleton also helps with the breaking down of bacteria.

=The Danger of HIV and AIDS=

=Conclusion= White blood cells are the only things that stand in between us, and death by thousands of tiny viruses. =References=

BrainPOP-blood video Prentice Hall Science Explorer-Human Body and Health grolier -blood