W1 - W2 Lymphatic organs lab-manual

Question 1

What is this slide about?

Answer 1

Thymus (lymphatics) - HE - human

Question 2

Name of this cell. 2 Functions?

Answer 2

Eosinophill in medulla

Functions:

1. may participate directly in the selection of T cells
2. ability of eosinophils to present antigen to T cells

Question 3

Thymus (lymphatics) - HE - human

Identify

Answer 3

Question 4

43c. Thymus (lymphatic) - newborn human - pancytoleratin immunocytochemistry - HE

Identify

Answer 4

cytokeratin negative zones

Question 5

43c. Thymus (lymphatic) - newborn human - pancytoleratin immunocytochemistry - HE

Answer 5

Question 6

43a. Thymus (lymphatics) - HE - human

Answer 6

CORTEX - epithelial cells surround a capillary

Question 7

43a. Thymus (lymphatics) - HE - human

Name of this area and structures

Answer 7

MEDULLA - macrophages

Question 8

43a. Thymus (lymphatics) - HE - human

Name of this area and structures

Answer 8

MEDULLA - Hassel’s body

Question 9

49)Thymus (H-E)
Identify

Answer 9

1) cortex.
2) medulla.
3) Hassalls corpuscles.
4) CT septum.
5) T-lymphocytes (mature).
5*) T-lymphocyte (immature).

Question 10

49)Thymus (H-E) - medulla

Answer 10

5) T-lymphocytes (mature).
6) reticular cells.

Question 11

49)Thymus (H-E) - CORTEX

Answer 11

5) T-lymphocytes (mature).
6) reticular cells.

Question 12

49)Thymus (H-E)

Identify

Answer 12

7) Lobules

Question 13

Hassles corpuscles (3) made of ____

Answer 13

degenerated epitheloid reticular cells)

Question 14

49)Thymus (H-E)
Identify

Answer 14

5)T-lymphocytes (mature).
M)Macrophage.

Question 15

49)Thymus (H-E)
Identify E

Answer 15

E)Epithelial cell part of Hassalls corpuscles (nuclei type 6).

Question 16

Thymus - Netter

→ identify

Answer 16

1. Capsule
2. Hassal’s corpuscles
3. Lymphocytes
4. Capillaries
5. Epithelial reticular cell

Question 17

The precursors of T-lymphocytes divide in ____ in thymus

Answer 17

the cortex (the majority will die and these cells are phagocyted by macrophages).

Question 18

The precursors of T-lymphocytes divide in the cortex (the majority will die and these cells are phagocyted by macrophages).

→ Surviving T-lymphocytes are able to ___ (function?)

Answer 18

recognize the MHC of the body.

Question 19

Surviving T-lymphocytes are able to recognize the MHC of the body.

→ later they will be able to differentiate further and ___ (function)

Answer 19

respond exogenous antigenic stimuli with specific reactions.

Question 20

The precursors of T-lymphocytes divide in the cortex (the majority will die and these cells are phagocyted by macrophages).

→ Mature T-lymphocytes enters ____

Question 21

THYMUS

The differentiation of the lymphocytes in the cortex happens behind ____

Answer 21

the blood thymus-barrier

Question 22

THYMUS

The differentiation of the lymphocytes in the cortex happens behind the blood thymus-barrier

→ this barrier is made by ___ (4 things)

Answer 22

1. the endothelial cells
2. the basal lamina of the capillary
3. the perivascular C.T
4. the basal lamina of the reticular cells!!.

Question 23

mature T-lymphocytes leave thymus through ___

Answer 23

vessels (4) situated at the cortex-medulla border.

Question 24

49)Thymus (H-E)
After puberty thymus (especially the cortex) degenerates and become ___

Answer 24

adipose thymus.

Question 25

**\*all the lymph organs** **except \_\_\_\_** **contain lymphatic follicle.**

Answer 25

**thymus**

Question 26

**On the route surface capsule or epithelium can be found:** → **capsule is present in ___ and \_\_\_**

Answer 26

**lymph node and spleen.**

Question 27

the **lymphoepithelial organs** have **epithelial covering** ## Footnote **→ These organs are \_\_**

Answer 27

**tonsils****,****Peyer’s patches****and****vermiform appendix****.**

Question 28

**Tonsils are covered by oral** **(stratified squamous non - keratinized)** **epithelium** **→ these tonsils are \_\_\_**

Answer 28

**lingual and palatine tonsils.**

Question 29

**Which tonsils are covered by** **respiratory (pseudostratified columnar ciliated epithelium)?**

Answer 29

**Other (****pharyngeal and tubarian)****tonsils**

Question 30

**\_\_\_ tonsil specimens contains also the cartilage of the auditory tube.**

Answer 30

**Tubarian**

Question 31

**intestinal lymphoepithelial organs are covered by ____ antimesenterial side of the lumen**

Answer 31

**simple columnar epithelium**

Question 32

**appendix contains \_\_\_\_** in the submucosa all along the organ.

Answer 32

**aggregation lymphatic follicle**

Question 33

What is this slide about?

Answer 33

**_47) palatine tonsil (H-E)_**

Question 34

**47)palatine tonsil (H-E).** → the organ is separated from the surrounding tissue components by \_\_\_

Answer 34

a CT capsule (5) made by collagen fibers and fibrocytes.

Question 35

**47)palatine tonsil (H-E).** **→** the free luminal surface is lined by \_\_\_

Answer 35

stratified squamous non keratinized epithelium (1) (covering the walls of the crypts as well).

Question 36

**47)palatine tonsil (H-E).** **→** under the epithelium ___ are visible.

Answer 36

the secondary lymphatic follicles (2) with germinal centers