Immune System

Aka

Lymph system

1. Skin Skin is a solid barrier to keep things out!

2. Mucous membranes traps pathogens; have cilia to move pathogens out

3. oil, sweat, tears and saliva Contain enzyme LYSOZYME which breaks down bacterial cell wall and kills cell

4. Normal bacterial inhabitants Bacteria that live on our skin and in our gut, will normally out-compete pathogens for resources

 

3.

Lymphatic system and circulatory system are

closely related structures that are joined by a

capillary system

 1.return tissue fluid to blood (maintain blood volume &

pressure)

2. protect body from microorganisms

What is the “other” name for the immune system?

Name 4 barriers to invasion by foreign invaders

List 2 functions of the immune system

1-LYMPH

2-LYMPH VESSELS

3-LYMPH NODES

4-SPLEEN

5-THYMUS

Similar to blood plasma

Bathes all tissues of body

Exits capillaries through filtration - enters lymph vessels through movement of muscles

Dead end capillaries in tissue spaces merge with larger lymph vessels and return fluid

back to the heart

Move by surrounding skeletal muscles squeezing (no pump!)

Have one way valves to keep from moving backwards!

Masses of lymph tissue that produce White Blood Cells

Located all around body in “groups” along lymph vessels

Acts as a filter or trap for foreign particles to be “eaten” by macrophages

Tonsils protective rings of lymph nodes

around nasal/oral cavitiesPeyer’s patches

lymph nodes around small intestine to catch pathogens absorbed by digestive system

Located below the diaphragm and behind the stomach

Filters/destroys bacteria & old/dead red blood cells

Location: below the thyroid and above the heart

T cells mature here

  

List 5 parts of the immune systemWhat does the spleen do?Name 2 of the specialized lymph

nodes in your body.Where are your Peyer’s Patches

located?Where do your T cells mature?