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Anatomy final 6512 > Lymphatic system histology > Flashcards

Lymphatic system histology Flashcards

1
Q

What are the three functions of the lymphatic system?

A
  1. Drain Excess Interstitial Fluid and return it to blood stream to help
    maintain normal blood volume
  2. Immune Response – produce, maintain, and distribute lymphocytes
  3. Provide an Alternative Transportation Route for Hormones, Nutrients, and Waste Products
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2
Q

What do B cells do?

A

They produce and secrete antibodies along with their derivative cell- humoral immunity- these make up 20-30% of circulating lymphocytes

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3
Q

What do T cells do?

A

After differentiation in the thymus they attach to and destroy cells- cell mediated immunity- these make up 60-80% of circulating lymphocytes

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4
Q

What do natural killer cells do?

A

They kill transformed cells- these make up 5-10% of circulating lymphcytes

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5
Q

Does diffuse lymphatic tissue have a capsule?

A

No

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6
Q

What is diffuse lymphatic tissue made of?

A

It is the accumulation of lymphocytes in the lamina propria of the alimentary canal, as well as respiratory, urinary, and reproductive tracts

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7
Q

In diffuse lymphatic tissue, will you find plasma cells or eosinophils?

A

Yes

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8
Q

What are lymphatic nodules and where are they found?

A

Accumulations of lymphocytes found in the wall of alimentary canal, as well as respiratory urinary and reproductive tracts

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9
Q

Do lymphatic nodules have a capsule? Are they sharply defined?

A

No

Yes

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10
Q

Will you see red blood cells in lymph?

A

No

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11
Q

What are the two types of lymphatic nodules? How are they differentiated?

A

Primary nodules- the aggregation of primarily small lymphocytes
Secondary nodules- have germinal center (with follicular dendritic cells present) and mantle zone

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12
Q

T/F Normally lymphatic nodules are found uniformly dispersed and by themselves?

A

False- randomly dispersed by themselves

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13
Q

T/F In certain locations of the alimentary canal, lymphatic nodules are grouped together?

A

True

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14
Q

What are two examples of lymphatic nodules?

A

Tonsils- create a ring around the entrance to the oropharynx and the nasopharynx
Peyers patches- found in the ileum

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15
Q

MALT stands for?
GALT stands for?
BALT stands for?

A

Mucous-associated lymphatic tissue
Gut-associated lymphatic tissue
Bronchus-associated lymphatic tissue

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16
Q

Diffuse lymphatic tissue and nodules are named for _____.

A

The region or organ in which they apear

17
Q

What is a lymph node?

A

A capsuled organ along the pathway of the lymphatic vessels

18
Q

What does a lymph node do?

A

Acts as a filtering system

19
Q

Lamina propria is found in conjunction with which type of membrane?

A

Mucous

20
Q

For lymph nodes, what are the four cells of the reticular meshwork?

A

Reticular cells
Dendritic cells
Macrophages
Follicular dendritic cells

21
Q

What is the flow of lymph through the lymph node?

A

Afferent lymph vessel–subcapsular (cortical) sinus–Trabecular sinus–Medullary sinus–Efferent lymph vessel

22
Q

The thymus is the site of ______ _____ _____, a process through which T cells mature and differentiate into immunocompetent T cells.

A

thymic cell education

23
Q

What is the function of the spleen?

A

It filters and monitors the blood immunologically just as the lymph nodes monitor lymph

24
Q

The spleen consists of two parts- what are they?

A

Red pulp

White pulp

25
Q

What is the red pulp of the spleen?

A

It consists of blood filled venous sinuses surrounded by splenic cords. the cords consist of red blood cells, macrophages, lymphocytes, plasma cells, and granulocytes

26
Q

What is the function of the red pulp of the spleen?

A

Its primary role is blood filtration

27
Q

What is the white pulp of the spleen?

A

It is lymphatic tissue consisting mostly of lymphocytes- lymphocytes aggregate around branches of the splenic artery.

28
Q

What is the purpose of the white pulps of the spleen?

A

To carry out immune functions similar to the lymph nodes

29
Q

In the superficial cortex of the lymph nodes, what types of lymphocytes are found there?

A

B cells

30
Q

What are the two types of structures in the medulla of lymph nodes?

A

Medullary cords

Medullary sinuses

31
Q

In the cortex of the lymph nodes, where are t cells found?

A

In the deep cortex

32
Q

T/F cords are groups of cells and sinuses will have lots of lymph flowing through them.

A

True

33
Q

The outer cortex contains what kind of lymphocytes?

A

B cells

34
Q

The inner cortex has what kind of lymphoctes?

A

T cells

Dendritic cells

35
Q

What are the cells of the medulla?

A

B cells

36
Q

What is the route of flow through the lymph node?

A

Afferent lymphatic vessel– subcapsular sinus–trabecular sinus–medullary sinus-efferent lymphatic vessel

Anatomy final 6512 (7 decks)

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