Hi I have My Biology Final soon and i am really confused about the immune system.
1. What are the 1st, 2nd, and 3rd line of immunity?
2. What exactly do the T Cells and B Cells do?
3. Can you describe the specific/non specific responses?
4. What Exactly do the Antigens and Anti bodies do
5.What are Macrophages and the Inflammatory Response?

If i can get a response it would be really helpfull