Lymphatic System

Question 1

Lymphatic System

Answer 1

collect lymph and filters it through lymph nodes and then returns it to the bloodstream

Question 2

Lacteals

Answer 2

in villi of SI

absorb lipids from intestines

Question 3

Chyle

Answer 3

lymph collected by lacteals

Question 4

Functions of Lymphatic System

Answer 4

drains interstitial fluid from tissue spaces
transports dietary lipids from GI tract to blood
Protects against invasion thru immune response

Question 5

Lymphatic Capillaries

Answer 5

closed ended vessels b/t tissue cells

Question 6

Lymphatic Vessels

Answer 6

runs next to A (in viscera) or V (in subcutaneous tissue)

Question 7

Places where there are no Lymphatic Vessels

Answer 7

CNS, bone marrow, teeth, avascular tissues (cornea)

Question 8

Vasa Vasorum

Answer 8

supply lymphatic vessels with nutrients

Question 9

Differences from Lymphatic Vessels to Veins

Answer 9

closed ended
larger
thinner tunics
anchoring filaments
ends of endothelial cells making up walls overlap

Question 10

Flow of Lymph

Answer 10

Interstitial Spaces- L. Capillaries- L Vessels- L Trunks- L. Ducts- Subclavian V- Arteries- Blood Capillaries

Question 11

9 Lymphatic Trunks

Answer 11

Lumbar, Jugular, Subclavian, Bronchomediastinal- paired

Intestinal- single trunk

Question 12

Lymphatic Trunks pass lymph to….

Answer 12

Thoracic Duct and Right Lymphatic Duct

Question 13

Cisterna Chyli

Answer 13

Intestinal Trunk + R and L Lumbar Trunk

Question 14

Thoracic Duct and R Lymphatic Duct drainage

Answer 14

L and R Subclavian V

Question 15

Control of flow of lymph from tissue space

Answer 15

contraction of skeletal muscles

valves

Question 16

Primary Lymphatic Structures

Answer 16

Red Bone Marrow
Thymus Gland
make T, B, NK cells

Question 17

Major Secondary Lymphatic Structures

Answer 17

lymph nodes, spleen, lymphatic nodules

most immune response

Question 18

T-Cells

Answer 18

Attack fungi, transplanted cells, cancer cells

Question 19

B-Cells

Answer 19

destroy bacteria

Question 20

Natural Killer Cells

Answer 20

attack spontaneously arising tumor cells

Question 21

Thymus

Answer 21

promote maturation of T-cells

secretes thymosin

Question 22

Thymosin

Answer 22

assists in promoting proliferation and maturation of T-cells

Question 23

Why do the Thymus and Spleen not have a filtering function?

Answer 23

they have no afferent lymphatic vessels

Question 24

White Pulp

Answer 24

part of spleen

mostly B-cells around central arteries

Question 25

Red Pulp

Answer 25

part of spleen venous sinuses w/ blood splenic cords b/t sinuses

Question 26

White Pulp Function

Answer 26

B-cell proliferation into plasma cells

Question 27

Red Pulp Function

Answer 27

phagocytosis of bacteria and bad RBCs and platelets | platelet reservoir

Question 28

Cortex of Lymph Nodes

Answer 28

outer region of densely packed T-cells and immature B-cells

Question 29

Medulla of Lymph Nodes

Answer 29

inner region of mature B-cells

Question 30

Germinal Centers of Lymph Nodes

Answer 30

contains masses of proliferating lymphocytes

Question 31

Medullary Cords of Lymph Nodes

Answer 31

inward extensions from cortex to hilum | T-cells, B-cells, macrophages

Question 32

Afferent Lymphatic Vessels

Answer 32

carry lymph from tissues to lymph nodes

Question 33

Efferent Lymphatic Vessels

Answer 33

carry lymph from hilum to venous circulation

Question 34

Macrophages

Answer 34

destroy foreign substances by phagocytosis

Question 35

Lymphocytes

Answer 35

destroy foreign substances by immune response

Question 36

Lymphatic Nodules

Answer 36

no capsule | clusters of lyphocytes in all mucous membranes

Question 37

Peyer's Patches

Answer 37

lymphatic nodules in ileum | contains macrophages

Question 38

Tonsils

Answer 38

create a ring of lymph tissue around pharynx | gather and remove pathogens entering pharynx

Question 39

Adenoid Tonsil

Answer 39

in posterior wall of nasopharynx

Question 40

Palatine Tonsils

Answer 40

in posterior region of oral cavity

Question 41

Lingual Tonsils

Answer 41

at base of tongue

Question 42

Appendix

Answer 42

has large groups of lymphatic nodules