Unit 4 Protecting
Increase your awareness of your own health and your commitment
to it by completing a Health
Inventory and Personal
Chapter 12, Lesson 1
How Lou Got the Flu
Infectious diseases spread from person to person and even
from animal to people. This site shows how the flu virus is
a microscopic hitchhiker that can travel great distances in
relatively short amounts of time. For example, you can trace
Lou’s flu back to Chinese ducks. Try to remember the last
time you had the flu. Who had it before you? Did anyone catch
it after you did? Create a chart that traces your flu as it
might have traveled through your friends and family.
Chapter 12, Lesson 2
Understanding the Immune System
Learn more about the workings of the immune system here. What
are lymphocytes? How are T- and B-cells related to lymphocytes?
After studying this site, summarize what the immune system
does in a short paragraph.
On the most basic level, your body is composed of millions
of individual cells that work together to fulfill the complex
functions of life. Blood cells carry oxygen to your muscles.
T-cells train to attack invading substances and particles.
This site contains hundreds of computer enhanced and microscopic
images and animations of cells. Click on the “Cell Gallery”
in the left navigation bar and find pictures and animations
of three different types of cell functions. To watch cells
real-time, click on “Cell Biology” and then “Cell Cams” to
see how quickly cancer cells grow and multiply.