Six lessons cover this chapter. Open any of them on its own below, or meet it in place inside chapter 12 of the book. Tick a lesson off once you can predict what it will do before you touch it.
1
Barriers — the First Line of Defense
Tap a body site to see its barrier. Then damage it and see what is left.
2
Phagocytosis, Step by Step
Step a phagocyte through the hunt, the meal and the kill. Then time it.
3
The Inflammatory Response
Step through redness, heat, swelling and pain. Then let it go body-wide.
4
Fever: Resetting the Thermostat
Set a dose and drag through one fever. Watch the chills, then the sweat.
5
The Three Outcomes of Complement
Pick a pathway and run the cascade. Count the tags, the alarms and the pores.
6
Interferons — the Antiviral Alarm
Let a virus loose in a sheet of cells. Race the alarm to the neighbors.