1. Immune System Keeping Us Safe

2. Maryland Science Content Standard Select several body systems and explain the role of cells, tissues and organs that effectively carry out a vital function for the organism, such as defense

3. Objective Title:Homeland Security Date:8/8/2015 I will be able to identify the types of organisms that cause disease, describe where pathogens come from and be able to explain how infectious disease is spread

4. Lesson Question: How can diseases spread and how do they enter the body?

5. Engage your thinking… Think about it…. What would happen if you were sick and shook hands with everyone in this class? Why?

6. Infectious Disease… What is it? Infectious disease is a disease that can pass from one person to another. They are caused by something called a pathogen. Infectious disease can spread among a population in a number of different ways.

7. Let’s explore pathogens! Let’s take a look at the different types of pathogens that can affect your body’s ability to maintain homeostasis…(remember that vocab word??) Use the website above and your books (Chapter 5: Section 1) to answer the following: 1. What is a pathogen? 2. What are the three major groups of pathogens? 3. How can a pathogen cause disease? 4. What are some types of disease/illness caused by pathogens? http://biop.ox.ac.uk/www/lj2001/lea/lea-4.html http://kidshealth.org/kid/talk/qa/germs.html

8. Explain… How are diseases spread? Use your text (Chapter 5: Section 1) to explain four ways that diseases can spread through a population of people. Be sure to include examples!

9. Extension… The spread of cholera… Look at “Sharpen your Skills” to answer the following: 1. What is cholera? Explain. 2. What was Dr. Snow’s hypothesis? Was it correct? 3. Explain how Dr. Snow was able to find out how cholera is spread.

10. Evaluate: How do pathogens spread and cause disease? Please explain using information from your text and our class investigations.

11. Evaluate yourself… Can You: Identify the types of organisms that cause disease. Describe where pathogens come from.Explain how infectious disease is spread.