White+Blood+Cell+-+AB

=Introduction=

White blood cells are the cells that prevent us from getting sick. White blood cells have many different types of functions. One special function they have is they surround and then eat and destroy bacteria. They also have a special structure. Their special structure is being the biggest cell. Finally, they have a real world connection. Their real world connection is that HIV can affect white blood cells.

toc =Your Personal Army=

White blood cells are just like an army because they all fight as a team and do different things.The process of how white blood cells kill bacteria is the virus particles go into the body, some particles are engulfed (of a natural force) by macrophages (Surround invaders and destroy items that shouldn't be there). Other virus particles infect body cells. In addition to this, helper T have receptor proteins they recognize the shape on the macrophages. T cell (identities pathogens and distinguishes one pathogen from another) response and B cell (produces protein) response. Next helper T cell activates killer T cell. Afterwards, killer T recognize the viral antigen (A molecule that the immune system recognizes either as part of the body or as coming from outside the body) on infected cells. Killer T cell wrecks the infected cells. After that helper T cell also activates B cells. B cells divide to make cells that can make antibodies (A protein that produced by a B cell of the immune system that destroys pathogens). Finally, antibodies bind to the viral antigen on the viruses. Antibodies bound the viruses to clump together. Clumping gets them destroyed.

=White Blood Cells are Designed For Battle=

White blood cells are big like a building because they are the biggest cells. White blood cells are bigger than red blood cells. In addition to this, it’s good for the white blood cells to be big so that they can eat other cells and bacteria easier. White blood cells also have a special structure for being able to change shape. White blood cells are also the only cells to be able to make antibodies. They change into the color white when they are all bulked together.

=AIDS/HIV=

All though it may seem that White blood cells are invincible, they actually aren’t. HIV is the only known virus that attacks the white blood cells and directly destroys T cells. More than 40 million people in the world, including more than 3 million children under 15, are infected with HIV. The immune system doesn’t work good when you have HIV so then other diseases not known attack. Many people survive attack after attack and diseases. =Conclusion=

A white blood cells is like a guard because they both protect people. Just like the function of the white blood, it protects the body. Unlike other cells the white blood cells is unusually large. White blood cells only get affected to HIV.

=References=


 * 1) BrainPop
 * 2) Grolier
 * 3) Discovery Education
 * 4) World Book Online
 * 5) 0-03-025537-6 human body systems and health
 * 6) Human Biology and Health
 * 7) The Circulator story