Histology of the Thymus and Peripheral Lymphoid Organs Flashcards Preview

MS1 - Blood & Lymph > Histology of the Thymus and Peripheral Lymphoid Organs > Flashcards

Flashcards in Histology of the Thymus and Peripheral Lymphoid Organs Deck (25)
Loading flashcards...
1

The ______ lymphatic is found in the hilum of the lymph node.

efferent

2

The cortex is ________.

mostly B cells

3

The paracortex is mostly _______.

T cells

4

_______ are where B cells have been stimulated; they are found within _____.

Germinal centers; follicles

5

The arterioles and venules are both found in the _______.

hilum of the lymph node

6

What are high endothelial venules?

Highly permeable venules found in the paracortex or cortex that allow diapedesis of lymphocytes

7

_______ divide the follicular centers.

Trabeculae

8

Bacteria, macrophages, and large particles get stuck in _________.

reticular fibers

9

_________ is a disease in which bacteria evade the immune system and divide in the lymph nodes.

Bubonic plague

10

List the cell types found in germinal centers.

B cells, Tfh, and APCs

11

As with lymph nodes, the thymus is also divided by _________ into pseudolobules.

trabeculae

12

______ serve as the skeleton of the thymus.

Stromal cells

13

______ and ______ are found within the trabeculae of the thymus.

Arterioles; venules

14

There are only _______ lymphatics in the thymus.

efferent

15

The _______ cells form the blood-thymus barrier that prevent antigens from entering the thymus.

reticulo-endothelial cells (which surround the connective tissue around blood vessels)

16

Hassell's (corpuscles) are ____.

look up... missed during lecture

17

In the thymus, blood vessels bypass the _____ via trabeculae and directly enter the _____.

cortex; medulla

18

There is no ______ lymph supply to the thymus.

afferent

19

The two arteries that supply the thymus are the ______.

internal thoracic and inferior thyroid

20

Describe the path of lymph through lymph nodes.

Afferent lymphatic, subcapuslary sinus, trabecula, trabecular sinus, cortex, medulla, efferent lymphatic

21

Circulating T and B lymphocytes recognize the ________ of lymph nodes, allowing them to enter and interact with lymph cells.

high endothelial venules

22

When the splenic artery splits into smaller tributaries, the tributaries are ______.

sheathed in T lymphocytes (white pulp)

23

In the thymus, the more mature T cells are in the _____.

medulla, and the immature cells are on the periphery (cortex)

24

Hassall's corpuscles are ______.

collections of reticular cells thought to be important in suppressing autoimmune dysfunction

25

In the spleen, macrophages are predominantly found in the ________.

red pulp (to destroy senescent RBCs)

Decks in MS1 - Blood & Lymph Class (60):