Syarafina, Miko & Amado

A Pathogen is an organism or a virus that can cause a disease.

Patho – disease Gen – producer

Figure 1: White Plague Pathogen obtained from http://www.coral.noaa.gov/coral_disease/white_plague_pathogen.shtml

Outermost skin is tough and protects the body from pathogens entering.

Moist that prevents the growth of fungi & bacteria.

Figure 2: Skin Image obtained from http://www.cosmosclinic.com.au/skincare/images/skin.jpg

Outermost Skin

Figure 2 Nasal Cavity obtained from www.sedationfacts.org

Mucous membranes line the internal cavities that are exposed to external environment.

Mucous secreted has antiseptic properties from the enzyme lysozyme.

Traps pathogens and either swallows or expels it.

Leucocytes- Neutrophils Migrate to infected tissues Like Amoeba Form vesicles Digested by lysosomes Process- Phagocytosis (form of endocytosis) Macophages http://highered.mcgraw-hill.com/olcweb/cgi/plu

ginpop.cgi?it=swf::535::535::/sites/dl/free/0072437316/120068/bio02.swf::Endocytosis%20and%20Exocytosis

Figure 3: Phagocyte Image obtained from http://ttmtan.myplace.nie.edu.sg/BI6101/2004/08/pathogen/host.html

Allott, Andrew, and David Mindorff. Biology - Course Companion. Oxford UP, 2007. Print.

Dephoff, J. “About White Blood Cells” 30 Sept. 2009. http://www.ehow.com/about_5398467_white-blood-cells.html

Fitzsimmons, Michael. “How Do White Blood Cells Work? EHow. 30 Sept. 2009. <http://www.ehow.com/how-does_5171339_do-white-blood-cells-work.html>.

“Host Defenses” The Biology of Prokaryotes. 30 Sept. 2009. http://ttmtan.myplace.nie.edu.sg/BI6101/2004/08/pathogen/host.html

Kivi, Rose. "How Does a Pathogen Enter Your Body?" EHow. Web. 29 Sept. 2009. <http://www.ehow.com/how-does_4574044_pathogen-enter-body.html>.

Williams, Brian. “How Do Phagocytes Destroy Microscopic Invaders?” EHow. 30 Sept. 2009. <http://www.ehow.com/how-does_5179866_do-phagocytes-destroy-microscopic-invaders.html>.