Chapter 11.3: Human Immune System
Table of Contents:
The immune system is what protects us against the hostile microbes that we are in contact with everyday. It consists of a protective outer wall and a team of well-versed soldiers who fight together to protect their kingdom — our body.
Before we dive into this exciting battlefield, there are a few terminologies that we should familiarize ourselves with, which we will be using a lot throughout the chapters.
- These are all kind of harmful microscopic enemies (virus, bacteria etc…) that can cause diseases.
- Many pathogens are bacterial in nature; common examples of diseases that are caused by bacteria include tuberculosis, gonorrhea, and syphilis. Tuberculosis is a disease that often affects your lungs and can lead to death if left untreated; it is caused by the acid-fast bacterium Mycobacterium tuberculosis. Gonorrhea is a sexually transmitted disease (STD) that is caused by Neisseria gonorrhoeae. Syphilis is another STD; it is caused by Treponema pallidum.