Ch.20: lymphatic system Flashcards Preview

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Flashcards in Ch.20: lymphatic system Deck (25)
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1
Q

Function of lymphatic system

A

Returns fluid that have leaked from the blood to the vascular system back to the blood

2
Q

The lymphatic system consist of three part

A
lymphatic vessels(network)
Lymph, the fluid contained in those vessels
Lymph nodes (cleanse the lymph as it passes)
3
Q

The lymphatic vessels form ____ way system in which the lymph flows only toward the heart

A

one way

4
Q

__________ transport of lymph begins, they weave through tissues cells and blood capillaries , widespread but absent from bones, teeth, bone marrow and the entire central nervous system

A

Lymphatic capillaries

5
Q

The _______ form the walls of the lymphatic cappilaries, contains minivalves

A

endothelial cells

6
Q

__________ anchor the endothelial cells to surround the structures so that any interstital fluid volume opens the minivalves , prevent collapse

A

Collagen filaments

7
Q

_________ transport absorbed fat from the small intestines to the blood stream

A

LActeal

8
Q

_______, fatty lymph, that drains from the fingerlike villi of the intestinal mucosa

A

Chyle

9
Q

The largest collecting vessels unite to form ________, which drain fairly large areas of the body

A

Lympphatic trunk

10
Q

Lymph transport:

A
low pressure conduits
the milking action of active skeletal muscles
pressure changes in the thorax
valves to prevent backflow
Pulsation of nearby arteries
smooth muscle, peristalsis
11
Q

_______ the main warriors of the immune system

A

Lymphocytes

12
Q

__________ phagocytizing foreign substances and by helping to activate t cells

A

Macrophages

13
Q

Spiny-looking __________ that capture antigens and bring them back to the lymphnodes

A

Dendritic cells

14
Q

__________ (langerhans cells), fibroblast like cells that produce the reticular fiber stroma, which is the network that supports the other cell types in lymphoid organs and tissues

A

Reticular cells

15
Q

_________ houses and provides proliferation site for lymphocytes and furnishes an ideal surviellence vantage point for lymphocyes and macrophages

A

lymphoid tissue

16
Q

Two types of lymphoid tissue

A
Diffuse lymphoid tissue (loose arrangement, lining)
lymphoid folliciles (nodules) (solid, spherical, ly,phoid cells and reticular fibers)
17
Q

____________, principal lymphoid organ, cluster along the lymphatic vessels of the body: FILTRATION AND IMMUNE SYSTEM ACTIVATION

A

Lymph nodes

18
Q

Structure of Node

A

capsule
trabaculae
cortex and medulla, medullary cords and lymph sinuses

19
Q

Circulation of Lymph nodes

A
Afferent lymphatic vessel
subcapsular sinus
medullary sinuses
hilium
 efferent lymphatic vessels
20
Q

Function of Spleen

A

provides a site for lymphocyte proliferation and immune surviellence and response
Stores some of the breakdown products
Stores blood platelets and monocytes
site of erythrocite production in fetus

21
Q

____________ are set of distributed lymohoid tissues strategically locates in mucous membranes throughtout the body , protects us from the never ending on slaught of pathogens

A

MALT Mucosa assosciated lymphoid tissue

22
Q

Largest collections of MALT

A

tonsils, peyer’s patches and appendix

23
Q

Four tonsils are

A
Palentine tonsiles (largest)
lingual tonsils (base of tongue)
pharyngeal tonsils (adenoids, nasopharnx)
tubal tonsils ( auditory tubes)
24
Q

________, or aggregated lymphoid nodules are large clusters of lymphoid follicles, small intestine

A

Peyer’s patches

25
Q

__________, concentration of lymphoid follicles, destroys bacteria before reaching intestinal wall, generate memory lymphocytes for long term immunity

A

Appendix