Immunity!
Sounds great, doesn't it?
What does this mean?
What are our lines of defense?
Do trees and bugs have the same defenses? What about single-celled organisms?
How do we fight these things off?
Are you ready for the test?
What is a pathogen?
What is the difference between direct and indirect diseases?
Name some different types of pathogens.
What are the three lines of defense?
Describe them.
What is immunity and how do we develop it?
Why would you reject an organ transplant?
Why are allergies important to understand?