White+Blood+Cells+-+VP

= = == =Introduction= toc The white blood cells are the guardians of your body’s galaxy. There the fighters against infection. They kill germs and stop infections. Without white blood cells we wouldn't exist we be overwhelmed by disease and infection. White blood cells are germ fighters. Their job is to kill bacteria and viruses. They do this by read their codes, which tell them if they are good or bad cells. Sometimes disasters hurt their ability to do their job. Leukemia infects white blood cells. White blood cells usually succeed in their job

=Function of the White Blood Cells=

White blood cells destroy germs and kills it. There are number of white blood they protect our body. White blood cells are a disease fighters however there are different types of white blood cells.White blood cells are complex. They attack bad cells many ways at the same time. They do it different ways. Some viruses get through. But some viruses are engulfed by macrophages. The macrophages begin to make viral antigens. The helper T-cells in the white blood read the viral from the macrophage. They then create T cells and B cells. Helper T cells then activate killer T cells.These cells attack the infected cells and stop them from making more. At the same time, helper T cells activate B cells. These B cells divide to make antibodies. They clump together to kill the bad germs



=Structures of a White Blood Cells=

White blood cells are designed to be bacteria killers. They can change into a different shape and can become thin to squeeze through small places. They also have sticky ends so they can stick to the bacteria. These sticky ends are called pseudopods. These sticky ends hold the bacterium in place to be engulfed. Most of the bacteria are killed within 15 minutes of getting engulfed. If the pseudopod can’t stick on, it will push the bacteria into a solid object so they cannot get away. Then they eat them.



= **Leukemia** =

Leukemia is a cancer that infects white blood cells. When your body has leukemia, large numbers of abnormal white blood cells are produced in the bone marrow. Cancer happens when cells aren’t normal and they grow too fast and spread out of control. Leukemia is the most common type of cancer kids get, but it’s still rare. Leukemia involves the blood and things like blood marrow. Usually white blood cells fight infection, but white blood cells in a person with leukemia don’t work the way they are supposed to work. The leukemia possess the white blood cells and turns them against the body.All together, leukemia accounts for about 30% of all childhood cancer. It affects more than 3,000 young people each year in America.

=Conclusion=

White blood cells can help our body in a good way. They kill bacteria that may cause us to get sick or die. They use their special structures and code reading ability in their job. They are truly the Guardians of your body’s Galaxy.

=References=

“Blood.” BrainPOP, 2017, www.brainpop.com/health/bodysystems/blood/. Accessed 30 Jan. 2017. Burnie, David. Microlife. New York, DK Pub., 1997. Leucocytes FortunaPix, 2014. Video Segment Discovery Education. Web. 30/1/2017. http://www.discoveryeducation.com. Padilla, Michael J., et al. Prentice Hall Science Explorer. Boston, Pearson Prentice Hall, 2007.