Lymphatic System

Question 1

Lymphatic system returns fluid to

Answer 1

The vascular system

Question 2

Lymphatic system consists of

Answer 2

lymphatic vessels, lymph, & lymph nodes

Question 3

Lymphoid organs & tissues are

Answer 3

The structural basis of the immune system

Question 4

Lymphatic organs are

Answer 4

Spleen, thymus, tonsils, other lymphoid tissues, lymph nodes

Question 5

Lymph nodes

Answer 5

Filter lymph

Question 6

Lymph is

Answer 6

The fluid of the lymphatic system

Question 7

Capillary fluid exchange is

Answer 7

The return of fluid back to the blood

Question 8

In filtration, fluid is forced out by

Answer 8

hydrostatic pressure at arterial end from blood pushing on the walls of the vessel

Question 9

In absorption fluid is returned

Answer 9

By colloid osmotic pressure at the venous end from pressure within the blood

Question 10

Fluid returned to the blood is

Answer 10

Interstitial fluid

Question 11

Lymphatic vessels collect interstitial fluid that

Answer 11

Does not circulate back into blood (one-way system towards heart)

Question 12

Lymphatic capillaries are

Answer 12

The start of the lymphatic transport system

Question 13

Lymphatic capillaries are found

Answer 13

Between tissue cells and blood capillaries in loose connective tissue

Question 14

Highly permeable/large molecules easily pass through describes the

Answer 14

Lymphatic capillaries

Question 15

Similar to veins but thinner with more valves

Answer 15

Lymphatic collecting vessels

Question 16

Lymphatic trunks

Answer 16

Drain large areas of the body

Question 17

Lymph from right arm and right side of head and thorax delivered back to circulatory system via

Answer 17

Right lymphatic duct

Question 18

Lymph from rest of body (left side and portion of right) delivered back to circulatory system via

Answer 18

Thoracic duct

Question 19

Lymphatic vessels are low or high pressure

Answer 19

Low pressure

Question 20

Prevent backflow of lymph

Answer 20

Valves

Question 21

Induces pressure changes when breathing

Answer 21

Respiratory pump

Question 22

Responsible for skeletal muscle compression

Answer 22

Skeletal muscle pumps

Question 23

Immunity present from birth; relies on common characteristics of many pathogens; first line of defence

Answer 23

Innate immunity

Question 24

Immunity involving T and B lymphocytes; helps the immune system learn, adapt, and remember pathogens

Answer 24

Adaptive immunity

Question 25

Lymphocytes arise in

Answer 25

The red bone marrow

Question 26

Mature in the thymus; manage immune response and attack and destroy infected cells

Answer 26

T cells

Question 27

Mature in the bone marrow; activate into antibody-secreting plasma cells

Answer 27

B cells

Question 28

innate cytotoxic immune cells

Answer 28

Natural Killer cells

Question 29

Phagocytes, help activate T cells

Answer 29

Macrophages

Question 30

Play role in T cell activation

Answer 30

Dendritic cells

Question 31

Make up stroma that supports other cell types

Answer 31

Reticular cells

Question 32

Key functions of the lymphoid tissue are:

Answer 32

Site for housing, activation and proliferation of lymphocytes; ideal location for macrophages and lymphocytes to survey for infection/disease

Question 33

Lymphocytes enter and exit back into blood via

Answer 33

Reticular connective tissue

Question 34

Types of lymphoid tissues

Answer 34

Diffuse, follicle/nodules, organs

Question 35

Has a loose arrangement of lymphoid cells with reticular fibres; located in most body tissues

Answer 35

Diffuse lymphoid tissues

Question 36

Are solid, tightly packed spherical bodies packed with lymphoid cells and reticular fibres

Answer 36

Lymphoid follicles

Question 37

Primary lymphoid organs are

Answer 37

Where T and B cells mature (red bone marrow, and thymus)

Question 38

Secondary lymphoid organs are

Answer 38

Where most immune responses occur (lymph nodes, spleen, MALT, tonsils, appendix, etc…)

Question 39

Maturation is

Answer 39

Lymphocytes developing immunocompetence and self-tolerance

Question 40

2 main functions of lymph nodes

Answer 40

Cleansing/filtering lymph (via macrophages) and activating the immune system (houses lymphocytes)

Question 41

Contains densely packed follicles with germinal centers for B cell proliferation

Answer 41

Lymph node cortex

Question 42

Contains medullary cords containing B and T cells

Answer 42

Lymph node medulla

Question 43

What lymph flow through: large lymphatic capillaries spanned by crisscrossing reticular fibres with macrophages

Answer 43

Lymph sinuses

Question 44

Lymph enter through

Answer 44

afferent lymphatic vessels

Question 45

Lymph exits via

Answer 45

Fewer efferent lymphatic vessels (slows down flow to give lymphocytes and macrophages time to do their jobs)

Question 46

Vaccine antigens travel through

Answer 46

Lymphoid follicles (contain antibody producing B cells)

Question 47

Buboes are

Answer 47

Inflamed, swollen lymph nodes

Question 48

Largest lymphoid organ; removes old/defective RBCs and platelets

Answer 48

Spleen

Question 49

Where old RBCs are destroyed

Answer 49

Red pulp of spleen

Question 50

Where immune function occurs

Answer 50

White pulp of spleen

Question 51

MALT

Answer 51

Prevent pathogens from penetrating mucous membranes

Question 52

Tonsils

Answer 52

Ring of lymphoid tissue around pharynx opening

Question 53

Tonsillar crypts

Answer 53

Catch bacteria and food particles to train immune cells

Question 54

Peyer’s patches are found

Answer 54

In the small intestine (ileum)

Question 55

Appendix is found

Answer 55

Near the large intestine

Question 56

Purpose of the thymus

Answer 56

Maturation site for T lymphocytes (contains no B cells or reticular fibres); most active in childhood

Question 57

Cortex of thymic lobules contain

Answer 57

Rapidly dividing T cells (maturing/proliferating)

Question 58

Medulla of thymic lobules contain

Answer 58

Mature T cells