Second+Ling+of+Defence

=Unit 1 Cells and Systems= =Chapter 3 The immune system protects the human body= 3.1 Second Line of Defence


 * 3.1** **Second Line of Defence** 102-103

__Second Line of Defence__
Your second line of defense is there to make an attack to destroy any pathogen that makes it pass the first line of defence. The success depends on your body's ability to distinguish between the cells that belong there and the cells that do not. There are two types of immune responses. All living things can mount an innate immune response. This immune response everyone born with. Animals with vertebrates can also mount an acquired immune response.

What does the success of your second line of defence depend upon? || Your body's ability to disinguish the cells that belong and the cells that don't. ||
 * Questions || Answers ||
 * What kind of immune response are we born with? || Innate immune response ||
 * Give a metaphor for what the second line of defence does.
 * What must the pathogens pass before they reach the second line of defence? || The first line of defence ||
 * Give a metaphor for what the second line of defence does. || It recognizes the uniforms of the cells and remembers them so that when they invade they can attack the right cells. ||
 * Name a type of immune response that animals with vertebrates have. || Acquired immune response ||