* The Mouth: This is a prime location for pathogens like bacteria and viruses due to the warm, moist environment and constant influx of food.
* The Nose: Like the mouth, the nose provides a warm, moist environment for pathogens.
* The Stomach: While the stomach's acid is harsh, some pathogens have adapted to survive there, like the bacteria *Helicobacter pylori*.
* The Intestines: The intestines offer a large surface area for pathogens to cling to, and the constant movement of food provides opportunities for them to spread.
* The Skin: The skin can be a barrier, but cuts, scrapes, and pores offer entry points for bacteria and fungi.
* The Bloodstream: Some pathogens, like viruses, can travel through the bloodstream to reach different parts of the body.
In the movie, the specific pathogen, Thrax, hides within the body's immune system, specifically within the white blood cells. This is a clever twist, as it plays on the idea that the body's defense system can be compromised by the very things it's designed to fight.
It's worth noting that the movie takes creative liberties with the depiction of pathogens and the immune system. While it does a good job of illustrating some basic concepts, the reality is far more complex.