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Flashcards in Lymphatic system Deck (29):
1

what are the functions of the lymphatic system?

tissue drainage
return of plasma and plasma proteins which escape from the circulatory system
absorbed fat transport from the gut
acquired immunity

2

how does the lymphatic system carry out the function of tissue drainage and return of plasma proteins?

drains escaped cell-free plasma (tissue fluid) from the extraceullular spaces back to the venous system

3

is there any evidence of the lymphatic system in the CNS?

No

4

what is lymph composed of?

fluid and plasma proteins only, gains lymphocytes as it flows through lymphatic capillaries and channels

5

where is fat added to lymph?

small intestine

6

how does lymph flow through lymphatic vessels?

similar to veins,relying upon muscle contraction, pressure changes and gravity

7

what prevents backflow of lymph through lymphatic vessels?

valves

8

what are lymph nodes?

the part of the lymphatic system where the immunological functions of lymph are located

9

where do groups of lymph nodes occur?

bases of major arterial trunks

10

what route does deep lymphatic drainage follow?

arterial supply

11

what route does superficial lymphatic drainage follow?

veins

12

are lymph nodes primary or secondary lymphoid tissue?

secondary

13

in a histological view of a lymph node, what are the germinal centres in the white pulp representative of?

secondary lymphoid follicules

14

50% of deep lymph nodes are located where?

the abdomen and pelvis

15

give an example of a superficial lymph node?

inguinal nodes located around the femoral triangle at the base of the lower limb

16

what are some examples of lymph node pathologies?

primary tumours (lymphomas), such as hodgkins lymphoma
secondary tumours as a result of metastasis
infections such as tuberculosis
inflammatory hyperplasia

17

what is the purpose of allowing lymph to pass through the germinal centres of the lymph node?

allows B and T cells to have any foreign antigens presented to them

18

what two ducts does all lymph drain into?

thoracic duct
right lymphatic duct

19

where does the right thoracic duct drain lymph from?

upper right quadrant of the body

20

where does the thoracic duct drain lymph from?

everywhere except the upper right quadrant of the body

21

what is each lymph node connected to?

an incoming and outgoing lymphatic vessel

22

what happens to the fats in lymph returning from the small intestine?

drain to the SVC and eventually the liver for absorption

23

what is hyperplasia?

the enlargement of an organ or tissue caused by an increase in the reproduction rate of its cells, often as an initial stage in the development of cancer.

24

where does lymph enter back into the circulatory system?

at the thoracic duct

25

what branch of the lymphatic ystem is contained within intestinal villi?

lacteal

26

what is the name given to lymph containing fat?

chyle

27

where are peyers patches?

in the wall of the small intestine

28

what are the function of peyers patches?

combat infection in the gut

29

where is lymph NOT drained from?

skin
cartilage
bone
CNS
majority of spleen and liver