When a germ enters the body this

1. When a germ enters the body this is how it goes...

2. The First Part • The first part of the immune system is the skin. The skin acts as a primary boundary between germs and your body. It is a bulwark to germs!!

3. Another way that a germ might enter your body is through your nose, mouth, and eyes. Your nasal passage is coated with mucus. The virus could get trapped in the mucus. It then gets swallowed.

4. This picture shows where the parts of the Immune System are located.

5. The Macrophage • After a virus escapes through the skin, it encounters the macrophages. It tries to eat the antigen. This acts as the garbage. If the macrophage can not kill the virus it then calls upon the helper T- cells.

6. Helper T- Cells • The helper T- cell identifies the virus. If the body has already had the virus then it is killed more quickly. But, if this is a new virus then the helper T- cells identify it as a foreign virus.

7. The B- Cells • Then the B- cells come in. The B- cells are in action now. They create the antibodies that kill the antigen. They circulate the blood and attach themselves to the foreign germs. Then other cells know that they need to be destructed. This is a picture of antibobies being marked for destruction.

8. Killer T- Cells • The antibodies are made according to what the virus is. After all of the antibodies are made then the killer T- cells come to kill the virus. The antibodies bind to the virus. This is the last thing that kills the virus. This picture shows the B- cells producing the antibodies.

9. While the T- cells are killing the virus, the suppressor T- cells stop the fighting once the virus is killed. If this is a new antigen then the memory T-cells remember the virus. If this same virus tries to enter the body again the memory T- cells know what it is. The virus can then be killed faster.

10. Thats how a germs is killed!!

11. This is the T- cells attacking the germ.

12. This is the T- cells being made.

13. Bacteria • Bacteria helps our bodies with digestion. Bacteria also helps us by destroying harmful organisms within our bodies

14. Bacteria • There are more bacteria cells in our bodies than there are human cells

15. Bacteria • Most bacteria cells will grow twice their size and split into daughter cells

16. Bacteria • Bacteria are used to make cheese, milk, bread and lots of other things

17. Bacteria • 99% of bacteria is helpful to the body

18. Bacteria • Dead or weakened Bacteria and Viruses are used for making helpful vaccines

19. Bacteria • Tetanus- failure of muscle

20. Bacteria • Diphtheria- highly infectious bacteria causing weakness, high fever, difficulty breathing, and is harmful to the tissue to the hart

21. Bacteria • Most bacteria is good for the body

22. Vaccines

23. What are vaccines? Vaccines are dead or weakened germs that are injected into your blood stream in order to teach the body how to fend off that disease

24. Vaccines are made by Scientists and doctors, they weaken or kill the germs then inject them into the body. These germs can be killed by using chemicals, heat, or radiation. Or they can be killed by making them go through layers of tissue,like that of a chicken egg How are vaccines made?

25. How do vaccines work? Vaccines work because they trick the body into believing that it is actually under attack. The body fights back until it defeats the virus and you become immunized