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Flashcards in Lymph Nodes Deck (18)
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1

What shape are lymph nodes?
Where are they concentrated?
How many are there?

kidney bean shaped organs
concentrated in the groin, axillary, and cervical regions
hundreds

2

What are lymph nodes surrounded by?

a fibrous capsule

3

Lymph nodes have extensions. What are they and what do they do?

trabeculae, these divide the lobes into lobules (like the thymus)

4

What makes up the stroma of the lymph node? (supporting structures that form a web)

trabeculae
capsule
reticular fibers
fibroblasts

5

a covering of dense connective tissue

capsule

6

a thin cavity where lymph flows into the lymph node

subcapsular sinus (or space)

7

round dark staining structures found in the cortex

lymphoid follicles

8

lighter staining center of the lymphoid follicle

germinal centers

9

What do germinal centers contain?

dendritic cells and macrophages

10

What are important in the processing and presenting antigen for activation of the T cells

macrophages and dendritic cells

11

This is in the center and contains medullary cords that contain B lymphocytes and plasma cells (antibody-secreting cells) as well as medullary sinuses.

medulla

12

Within the center of the medullar is the medullary cord, what is in the medullary cord?

B lymphocytes
plasma cells (antibody-secreting cells)
medullary sinus

13

flow into the lymph node

afferent lymphatic vessels (a special type of collecting lymphatic vessel)

14

flow out of the lymph node

efferent lymphatic vessels (a special type of collecting lymphatic vessel)

15

This provides channels for the flow of lymph within the lymph node. They are formed by reticular fibers.

medullary sinuses

16

What are the medullary sinuses formed by?

reticular fibers

17

What are the 4 phases of the flow of the lymph through the lymph node?

1. afferent lymphatic vessels
2. subcapsular sinuses
3. medullary sinuses
4. efferent lymphatic vessels

18

This dips into the lymph node where the efferent lymphatic vessels are located.

hilum