1. IMMUNE SYSTEM NON-SPECIFIC DEFENSEPP
IMMUNE SYSTEM NON-SPECIFIC DEFENSE

2. FUNCTION
Fights pathogens to prevent infections and disease

3. FUNCTION Fights pathogens to prevent infections and disease
Works with the lymphatic system (collects fluid and returns it to the blood)

4. STRUCTURES Bone marrow: produces blood cells
Lymphocytes: white blood cells (wbc)

5. STRUCTURES Bone marrow: produces blood cells
Lymphocytes: white blood cells (wbc)
Lymph nodes: stores wbc
Thymus: matures wbc

6. STRUCTURES Bone marrow: produces blood cells
Lymphocytes: white blood cells (wbc)
Lymph nodes: stores wbc
Thymus: matures wbc
Spleen: contains wbc that clean out pathogens as blood filters through

7. INITIATING THE IMMUNE SYSTEM
Antigen: any substance that the immune system responds to.

8. INITIATING THE IMMUNE SYSTEM
Antigen: any substance that the immune system responds to.
pathogens: cause disease

9. INITIATING THE IMMUNE SYSTEM
Antigen: any substance that the immune system responds to.
pathogens: cause disease
viruses: protein shell containing DNA or RNA
Bacteria
Fungi (spores)
Parasites
Toxins (snake bites etc)

10. INITIATING THE IMMUNE SYSTEM
Antigen: any substance that the immune system responds to.
pathogens: cause disease
viruses: protein shell containing DNA or RNA
Bacteria
Fungi (spores)
Parasites
Toxins (snake bites etc)
Allergens: Cause allergies (pollen etc.)
Put Your Hands Together

11. Nonspecific Defense
Protects body against any pathogen, regardless of the pathogen’s identity.

12. FIRST LINE OF DEFENSE
Skin
Block entry
Toxic-Sweat & Oil

13. FIRST LINE OF DEFENSE Skin mucous membranes Block entry
Toxic-Sweat & Oil
mucous membranes
Mucous-traps pathogens
Cilia-moves pathogens out of body

14. FIRST LINE OF DEFENSE Skin mucous membranes stomach acids Block entry
Toxic-Sweat & Oil
mucous membranes
Mucous-traps pathogens
Cilia-moves pathogens out of body
stomach acids
destroys pathogens

15. SECOND LINE OF DEFENSE Non Specific Response
Inflammatory response

16. SECOND LINE OF DEFENSE Non Specific Response
Inflammatory response
Injured cells release a chemical signal called histamine to increase blood flow to area

17. SECOND LINE OF DEFENSE Non Specific Response
Inflammatory response
Injured cells release a chemical signal called histamine to increase blood flow to area
Platelets cause clotting trapping pathogens

18. SECOND LINE OF DEFENSE Non Specific Response
Inflammatory response
Injured cells release a chemical signal called histamine to increase blood flow to area
Platelets cause clotting trapping pathogens
Area swells, becomes warm, and macrophages/phagocyte (wbc) move in and engulf bacteria

19. SECOND LINE OF DEFENSE Non Specific Response
interferons: enzymes that stop virus protein production

20. SECOND LINE OF DEFENSE Non Specific Response
interferons: enzymes that stop virus protein production
fever: slow growth of bacteria and increase activity of wbc
Should a fever always be treated? Why or why not?

21. SECOND LINE OF DEFENSE Non Specific Response
Your body has many different types of lymphocytes (WBC)

22. SECOND LINE OF DEFENSE Non Specific Response
Your body has many different types of lymphocytes (WBC)
Types of Phagocytes (engulf)
Neutrophils: Ingest pathogens

23. SECOND LINE OF DEFENSE Non Specific Response
Your body has many different types of lymphocytes (WBC)
Types of Phagocytes (engulf)
Neutrophils: Ingest pathogens
Macrophage: Engulf pathogens & other cell debris
Natural Killer Cells: Burst pathogen infected cells