1. Lymphatic System EQ: How does the lymphatic system destroy pathogens that enter our body?

2. Root Words

3. Pathogens
Any foreign molecules that enter the body: Particles, viruses, bacteria, pollen, etc.

4. Lymphatic System
Part of the immune system and helps destroy pathogens that enter the body
Works with circulatory system, moving white blood cells around

5. Uses fluid from digestive and circulatory system to filter out dead cells, viruses, bacteria.
After filtering, it returns the fluid

6. Lymphatic Pathway
System of capillaries and tubes that run through the body and filter bodily fluids

7. Lymph
Fluid, similar to plasma, that runs through the lymphatic pathways, filtering and transporting

8. Lymph nodes trap and remove pathogens from the lymph as it flows through.
Similar to a check point
Lymph nodes store Leukocytes to destroy pathogens

9. When you have an infection, your body produces more white blood cells, which gather in the lymph nodes
This causes lymph nodes to swell.

11. Lymphocytes
Specific white blood cells that destroy pathogens in the lymphatic system

14. Spleen
Organ that recycles old red blood cells and produces lymphocytes
Also stores blood and platelets.

16. Tonsils
Cluster of lymph tissue in your throat that protects against pathogens that enter your nose and mouth.
Your body can function without tonsils

17. Mechanical Barriers
Skin, mucous membranes in organs, hair provide first line of defense.

18. Chemical Barriers
Enzymes, gastric juice, leukocytes, lymphocytes act as second defense after mechanical barriers fail

19. Inflammation Tissue response to injury or infection.
Infected cells release chemical that attract leukocytes to phagocytize pathogens.
Result is damaged cells, destroyed bacteria called pus

23. LEFT SIDE ACTIVITY Draw a body which shows the lymphatic system
Label all of the organs and their function of the lymphatic system and the location of the lymph nodes.