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Immunity Unit Day 2 Every path has its puddle. English proverb

Immunity Unit Day 2

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Immunity Unit Day 2. Every path has its puddle. English proverb. Today’s Agenda. Lymph Notes on obj. 2, 3, 4 Color nodes Notes on objective 5-8 Practice. A T cell infected with HIV. Obj. 2 Lymph Transport: Flow of lymphatic fluid. The flow of lymph is slow - PowerPoint PPT Presentation

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Page 1: Immunity Unit Day 2

Immunity Unit Day 2

Every path has its puddle.

English proverb

Page 2: Immunity Unit Day 2

Today’s Agenda

Lymph Notes on obj. 2, 3, 4

Color nodesNotes on objective 5-8Practice

Page 3: Immunity Unit Day 2

A T cell infected with HIV

Page 4: Immunity Unit Day 2

Obj. 2 Lymph Transport: Flow of lymphatic fluid

The flow of lymph is slow The flow is maintained by skeletal

contractions, pressure changes in the thoracic and contractions of the lymph vessels.

Valves prevent backflow.Lymphatic capillaries are exceptionally

permeable, admitting proteins and particles from the interstitial space.

Page 5: Immunity Unit Day 2
Page 6: Immunity Unit Day 2

Circulation in the Lymph Nodes

Lymph fluid enters node through afferent lymphatic vessels.

Exits lymph node through efferent lymphatic vessels.

There are fewer efferent vessels allowing lymph fluid to stagnate (stay longer) in the lymph node before exiting, allowing time for cleaning this lymph fluid.

Page 7: Immunity Unit Day 2
Page 8: Immunity Unit Day 2

Other Lymphoid Organs:These organs don’t filter but do contain macrophages and lymphocytes.

Spleen: Destroys old or defective red blood cells

Stores platelets Acts as a hematopoietic site in the embryo and in sever cases of anemia

Page 9: Immunity Unit Day 2

Other Lymphoid Organs:These organs don’t filter but do contain macrophages and lymphocytes.

Thymus glandMost functional during youth

Its hormones cause T lymphocytes to become immuno competent.

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Other Lymphoid Organs:These organs don’t filter but do contain macrophages and lymphocytes.

Tonsils and Peyer’s patches Small organs known collectively ast GALT (gut-associated lymphatic tissues).

Prevent pathogens in the respiratory and digestive tract from going through the mucous membrane lining

Page 13: Immunity Unit Day 2
Page 14: Immunity Unit Day 2

Obj. 5 Nonspecific Defenses: things your body uses to defend against ANYTHING

1. Skin & mucous membranes 2. Phagocytic cells 3. Natural killer cells 4. Inflammatory response 5. Antimicrobial substances 6. Fever

Page 15: Immunity Unit Day 2

Obj. 5 Nonspecific Defenses: things your body uses to defend against ANYTHING

1. Skin & mucous membranes

LOW

pH

SALIVA

TEARS

MUCUS

Page 16: Immunity Unit Day 2

Bacterial leprosy infection just under skin.

Page 17: Immunity Unit Day 2

“border line leprosy—numb centers

Page 18: Immunity Unit Day 2

Obj. 5 Nonspecific Defenses: things your body uses to defend against ANYTHING

1. Skin & mucous membranes

2. Phagocytic cells--macrophages

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Page 20: Immunity Unit Day 2

Obj. 6 1. Skin & mucous membranes

2. Phagocytic cells – engulf and destroy pathogens

3. Natural killer cells – attack and lyse body cells infected by viruses or that are cancerous.

Page 21: Immunity Unit Day 2

Obj. 7 Inflammatory response 1. Skin & mucous membranes 2. Phagocytic cells 3. Natural killer cells

4. Inflammatory response damaged tissues release histamines Histamines make vessels leaky, releasing phagocytes & clotting factors

Phagocytes engulf bacteria Platelets form clots

Page 22: Immunity Unit Day 2

Obj. 7

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Obj. 5 Nonspecific Defenses: things your body uses to defend against ANYTHING

1. Skin & mucous membranes 2. Phagocytic cells 3. Natural killer cells 4. Inflammatory response

5. Antimicrobial substances InterferonComplement proteins

Page 25: Immunity Unit Day 2

Obj. 8 Fever 1. Skin & mucous membranes 2. Phagocytic cells 3. Natural killer cells 4. Inflammatory response 5. Antimicrobial substances

6. Fever Macrophages release pyrogens Hypothalamus elevates temperature

Liver & spleen supply less iorn Bacteria don’t grow well without iron

Metabolism increases speeding repair.

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