The Immune System
It keeps you healthy!
The Three Lines of Defense
First line of defense:
1. Skin
2. Mucous membranes and cilia
3. Stomach acid (HCL) and saliva
Second line of defense
1. White blood cells (phagocytes)
2. Inflammatory response (hello WBC's come here to this wound!)
Third line of defense
1. Lymphocytes
2. Antibodies
HIV and AIDS
HIV infects your T-cells, which compromises your immune system.
What are the ways in which HIV is transmitted?
The Functions of the Immune System include protecting you from pathogens and returning excess fluid to the heart.
Memory Cells
Memory cells remember the pathogens that have made you sick so that you make your own antibodies. Isn't that NEAt?
A Balanced immune system is a healthy one!
Accessory organs of the immune system
Lymph nodes
Thymus
Lymph vessels
Peyer's patches
Tonsils
Immune System Check-up: Number your papers 1-3 and answer the following questions.
1. What is the first line of defense against pathogens that can make you sick?
2. What cells of the immune system does the HIV virus infect?
3. What are the 2 functions of the immune system?
HIV Animation
TLC - Waterfalls