LYMPHATIC SYSTEM Flashcards Preview

T1 PHYSIOLOGY > LYMPHATIC SYSTEM > Flashcards

Flashcards in LYMPHATIC SYSTEM Deck (42):
1

Name the 3 Lymphatic organs.

- Red Marrow
- Thymus
- Spleen

2

What is the function of Red Marrow in the Lymphatic System?

Produces B Cells and immature T Cells (Pre-T Cells)

3

What is the function of the Thymus in the Lymphatic System?

Produces mature T Cells from Pre-T Cells

4

Which structure contains a large mass of lymph tissue?

Spleen

5

What is the function of the Spleen?

- Removes ruptured RBCs
- Stores platelets and monocytes

6

Describe the mechanism of Lymphatic Capillaries.

In between spaces of cells, absorbing interstitial fluid in but not out

7

Describe the mechanism of Lymphatic Vessels

Merged from capillaries - one-way valves passing through Lymph Nodes

8

Describe the mechanism of Lymph Nodes.

Clusters of lymphocytes in a dense CT capsule alone the lymphatic vessels as a lymph filtration

9

Describe the Lymphatic Trunks.

Merged from Lymphatic Vessels

10

What are the 2 types of Lymphatic Ducts?

- Thoracic Duct
- Right Lymphatic Duct

11

Explain the Thoracic Duct.

Drains:
- Left head/neck/chest
- entire body below Ribs

Into: (L) Subclavian Vein

12

Explain the Right Lymphatic Duct.

Drains:
- Right head/neck/chest

Into (R) Subclavian Vein

13

What is the sequence of Lymphatic Flow

Blood Capillaries
Interstitial Space/Fluid
Lymph Capillaries
L. Vessels
L. Ducts
Subclavian Veins

14

What maintains Lymphatic Flow?

- Skeletal muscle pump
- Breathing/Respiratory Pump
- Smooth muscle contractions

15

Describe the Non-Specific Defence Mechanism.

- Doesn't recognize invaders (no memory)
- Rapid response

16

Explain the defence of Skin. (1st Line Defence)

Sheds keratinized cells (1st Line Defence)

17

Explain the defence of Tears. (1st Line Defence)

Washes eyes

18

Explain the defence of Saliva. (1st Line Defence)

Washes teeth and mucous membrane

19

Explain the defence of Urine. (1st Line Defence)

Reduces microbial growth

20

Explain the defence of Gastric Juice. (1st Line Defence)

Stomach destroys bacteria

21

Explain the defence of Defecation and Vomiting. (1st Line Defence)

Removes microbes

22

Function of Antimicrobial Proteins. (2nd Line Defence)

Discourage microbial growth

23

Function of Natural Killer Cells. (2nd Line Defence)

Recognizes/kills microbes

24

Function of Phagocytes. (2nd Line Defence)

Eats microbes

25

Function of Inflammation. (2nd Line Defence)

- Response to tissue damage
- Remove/Prevent/Prepare

26

Function of Fever. (2nd Line Defence)

Intensifies antimicrobial activity

27

What is the Specific Defences also known as?

Immunity

28

Define Antigen.

Substance recognized as foreign and evokes an immune response

29

Name the 2 types of Antigens.

- Cell-Mediated
- Antibody-Mediated

30

Explain Cell-Mediated Immune Responses.

Effective against Fungi / Parasites / Viruses / Cancer cells / Foreign Tissue.

T-Cells activate/enlarge/proliferate/differentiate

31

What is the function of Helper T Cells?

Trigger Proliferation

32

What is the function of Cytotoxic T Cells?

Migrate and destroy invader

33

What is the function of Memory T Cells?

Stays at site and attack future infections stronger

34

Explain Antibody-Mediated Immune Response

Effective against Body Fluids / Extracellular Pathogens

B-Cells activate/enlarge/differentiate

35

What is the function of Plasma Cells in an immune response?

Secrete Antibodies

36

What is the function of Memory B Cells?

Stays at site and attack future infections stronger

37

Describe Antibodies/Immunoglobulins.

Produced by plasma cells to neutralize, inhibit, or destroy antigen

38

Describe IgG.

Found in blood/lymph/intestines
Crosses placenta to newborn

39

Describe IgA.

Found in sweat/tears/saliva/mucous/breast milk/GI
Decreases during stress

40

Describe IgM.

Found in blood/lymph
Blood transfusion reaction

41

Describe IgE.

Found in blood
Involved in allergic/hypersensitive reactions/against parasitic worms

42

Describe IgD.

Found in blood
Activates B Cells