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BIO > Lymphatic System > Flashcards

Lymphatic System Flashcards

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1
Q

Lymphatic system returns fluid to

A

The vascular system

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2
Q

Lymphatic system consists of

A

lymphatic vessels, lymph, & lymph nodes

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3
Q

Lymphoid organs & tissues are

A

The structural basis of the immune system

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4
Q

Lymphatic organs are

A

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

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5
Q

Lymph nodes

A

Filter lymph

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6
Q

Lymph is

A

The fluid of the lymphatic system

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7
Q

Capillary fluid exchange is

A

The return of fluid back to the blood

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8
Q

In filtration, fluid is forced out by

A

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

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9
Q

In absorption fluid is returned

A

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

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10
Q

Fluid returned to the blood is

A

Interstitial fluid

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11
Q

Lymphatic vessels collect interstitial fluid that

A

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

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12
Q

Lymphatic capillaries are

A

The start of the lymphatic transport system

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13
Q

Lymphatic capillaries are found

A

Between tissue cells and blood capillaries in loose connective tissue

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14
Q

Highly permeable/large molecules easily pass through describes the

A

Lymphatic capillaries

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15
Q

Similar to veins but thinner with more valves

A

Lymphatic collecting vessels

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16
Q

Lymphatic trunks

A

Drain large areas of the body

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17
Q

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

A

Right lymphatic duct

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18
Q

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

A

Thoracic duct

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19
Q

Lymphatic vessels are low or high pressure

A

Low pressure

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20
Q

Prevent backflow of lymph

A

Valves

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21
Q

Induces pressure changes when breathing

A

Respiratory pump

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22
Q

Responsible for skeletal muscle compression

A

Skeletal muscle pumps

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23
Q

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

A

Innate immunity

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24
Q

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

A

Adaptive immunity

25
Q

Lymphocytes arise in

A

The red bone marrow

26
Q

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

A

T cells

27
Q

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

A

B cells

28
Q

innate cytotoxic immune cells

A

Natural Killer cells

29
Q

Phagocytes, help activate T cells

A

Macrophages

30
Q

Play role in T cell activation

A

Dendritic cells

31
Q

Make up stroma that supports other cell types

A

Reticular cells

32
Q

Key functions of the lymphoid tissue are:

A

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

33
Q

Lymphocytes enter and exit back into blood via

A

Reticular connective tissue

34
Q

Types of lymphoid tissues

A

Diffuse, follicle/nodules, organs

35
Q

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

A

Diffuse lymphoid tissues

36
Q

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

A

Lymphoid follicles

37
Q

Primary lymphoid organs are

A

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

38
Q

Secondary lymphoid organs are

A

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

39
Q

Maturation is

A

Lymphocytes developing immunocompetence and self-tolerance

40
Q

2 main functions of lymph nodes

A

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

41
Q

Contains densely packed follicles with germinal centers for B cell proliferation

A

Lymph node cortex

42
Q

Contains medullary cords containing B and T cells

A

Lymph node medulla

43
Q

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

A

Lymph sinuses

44
Q

Lymph enter through

A

afferent lymphatic vessels

45
Q

Lymph exits via

A

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

46
Q

Vaccine antigens travel through

A

Lymphoid follicles (contain antibody producing B cells)

47
Q

Buboes are

A

Inflamed, swollen lymph nodes

48
Q

Largest lymphoid organ; removes old/defective RBCs and platelets

A

Spleen

49
Q

Where old RBCs are destroyed

A

Red pulp of spleen

50
Q

Where immune function occurs

A

White pulp of spleen

51
Q

MALT

A

Prevent pathogens from penetrating mucous membranes

52
Q

Tonsils

A

Ring of lymphoid tissue around pharynx opening

53
Q

Tonsillar crypts

A

Catch bacteria and food particles to train immune cells

54
Q

Peyer’s patches are found

A

In the small intestine (ileum)

55
Q

Appendix is found

A

Near the large intestine

56
Q

Purpose of the thymus

A

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

57
Q

Cortex of thymic lobules contain

A

Rapidly dividing T cells (maturing/proliferating)

58
Q

Medulla of thymic lobules contain

A

Mature T cells

BIO (12 decks)

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