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Histo LAB > Lymphatics > Flashcards

Lymphatics Flashcards

1
Q

What is the composition of lymphoid system

A

lymphocytes, lymphoid organs and lymphatic vessels

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2
Q

What is the composition of the lymphoid organs

A 
Bone marrow
Lymph nodes
Thymus
Spleen
MALT
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3
Q

What is the main function of the lymphoid system

A

It protects the body from pathogens and diseased cells

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4
Q

It is organized into organs and tissues that are functionally unified via blood and lymph vascular systems

A

Immune System

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5
Q

It is also known as central lymphoid organs

A

Primary lymphoid organs

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6
Q

It is the site where lymphocytes mature

A

Primary lymphoid organs

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7
Q

Where is B cells produced

A

Bone marrow

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8
Q

Where is T cells produced

A

Thymus

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9
Q

It is also known as peripheral lymphoid tissue

A

Secondary lymphoid organs

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10
Q

Where are the secondary lymphoid organs distriibuted

A

blood or lymph

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11
Q

What are the secondary lymphoid organs

A

lymph nodes
spleen
diffuse lymphoid tissues

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12
Q

It is a small, bean shaped, encapsulated organs located

throughout the body along lymphatic vessels.

A

Lymph nodes

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13
Q

It serves as filters of lymph

A

Lymph nodes

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14
Q

It is a dense connective tissue enclosing the node

A

Capsule

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15
Q

It is the space underneath the capsule that receives the lymph

A

Subcapsular sinus

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16
Q

It is the connective tissue that extends inward from the capsule

A

Trabecula

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17
Q

It is the spaces alongside trabeculae in which lymph flows from the subcapsular sinus into the cortex.

A

Trabecular sinuses

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18
Q

It is the outer region of the node

A

Cortex

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19
Q

It is the region adjacent to the capsule.

A

Outer cortex

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20
Q

It is spherical clusters of B lymphocytes.

A

Nodules

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21
Q

It is the light center where B lymphocytes differentiate to plasma cells

A

Germinal Center

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22
Q

It is the region between the outer cortex and the medulla that is free of nodules.

A

Inner cortex (paracortex)

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23
Q

The inner part of the node

A

Medulla

24
Q

It contains antibody
secreting plasma cells, macrophages, and
B lymphocytes.

A

Medullary cords

25
Q

The intervening spaces in
which lymph flows before exiting the node
via efferent lymphatic vessels.

A

Medullary sinuses

26
Q

It responds to

antigens that enter the body through mucosae.

A

MUCOSA-ASSOCIATED LYMPHOID TISSUE(MALT)

27
Q

Where does the MALT underly

A

Digestive and respiratory systems

28
Q

What are the examples of MALT

A

Tonsils
Lymphoid aggregates (nodules)
Dispersed immune cells

29
Q

It is found in the underlying connective tissue

surrounding the upper part of the pharynx.

A

Tonsils

30
Q

It covers the numerous nodules that compromise the

palatine tonsil.

A

Stratified Squamous Non-Keratinized Epithelium

31
Q

Spherical aggregations of lymphocytes that usually

have germinal centers.

A

Nodules

32
Q

Infoldings of the epithelium into the underlying

connective tissue.

A

Crypts

33
Q

It is large numbers of plasma cells are usually seen in
the underlying connective tissue near the
epithelium.

A

Plasma cells

34
Q

The largest secondary lymphoid organ in the body

A

Spleen

35
Q

What are the two compartments of the spleen

A

Red pulp

White pulp

36
Q

It filters the blood of foreign material

and old or damaged red blood cells

A

Red Pulp

37
Q

The site of immune reactions to bloodborne

antigens

A

White pulp

38
Q

The spleen is also the storage site of what

A

RBC, platelets and iron

39
Q

It is the dense connective tissue enclosing the organ.

A

Capsule

40
Q

A connective tissue that extends inward from the capsule through which
blood vessels enter the pulp.

A

Trabecula

41
Q

It appears basophilic due to the large number of

nuclei.

A

White pulp

42
Q

Clusters of B lymphocytes
located on central arterioles. They usually
contain a germinal center of activated B lymphocytes.

A

Splenic nodules

43
Q

Branches of trabecular
arteries coated by PALS and adjacent to
nodules.

A

Central Arterioles

44
Q

cylindrical mass of
mature T lymphocytes that
surrounds central arterioles.

A

PERIARTERIOLAR LYMPHATIC SHEATH (PAL)

45
Q

It filters and degrades red blood cells (RBCs)

A

Red pulp

46
Q

The region between white and red pulp where
macrophages, dendritic cells, and lymphocytes
interact.

A

Marginal zone

47
Q

The primary lymphoid organ in which T lymphocytes
proliferate and mature before distribution to
peripheral lymphoid tissues.

A

Thymus

48
Q

Is well-developed and fully

functional.

A

Neonatal Thymus

49
Q

Thin connective tissue layer surrounding the thymus

that extends inwards to form incomplete lobules.

A

Capsule

50
Q

The outer darker, region of small lymphocytes.

A

Cortex

51
Q

A small nuclei of condensed

chromatin.

A

T lymphocytes

52
Q

Cells with
oval nuclei and lightly stained cytoplasm
with processes.

A

Epithelial reticular cells

53
Q

Large cells that

phagocytize T cells marked for removal.

A

Macrophages

54
Q

The inner, lighter region of larger lymphocytes.

A

Medulla

55
Q

Closely packed, concentrically arranged epithelial reticular cells

A

Hassell’s Corpuscle

56
Q

it is the most readily identifiable feature of the thymus.

A

Hassell’s Corpuscle

Histo LAB (7 decks)

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