Lymphatics Flashcards Preview

Anatomy and Physiology > Lymphatics > Flashcards

Flashcards in Lymphatics Deck (25):
1

What is unique about circulation of the lymphatic system?

Closed with no pump

2

What is lymph?

Interstitial fluid and protein (Lymphocytes) with a small amount of RBCs

3

How is lymph prevented from flowing back into lymphatic capillaries?

Luminal valves

4

What are the two primary lymphoid organs?

Thyroid, Bursa of Fabricius

5

What are secondary lymphoid organs/tissues?

Lymph nodes, tonsils, spleen, MALT, GALT

6

What are the three main functions of the lymphatic system?

Fluid recovery (Preventing edema), lipid absorption, WBC transport

7

Where does lymph picked up on the RIGHT side of the body drain?

Right lymphatic duct, right subclavian vein and then back into circulation

8

Where does lymph picked up on the LEFT side of the body drain?

Thoracic duct, left subclavian vein and then back into circulation

9

How is lymph moved throughout the body?

Breathing, skeletal muscle contraction, smooth muscle contraction in lymphatic vessel walls

10

Name the six locations of lymph nodes on a dog.

Parotid, submandibular, prescapular, axial, inguinal, and popliteal

11

What type of cell is produced in the thyroid gland?

T lymphocytes (T cells)

12

What are the cells of the thymus called?

Thymocytes

13

T-cells mature as they move from which part of the thymus to which other part of the thymus?

Mature as they move from the cortex to the medulla

14

What do thymus-epithelial reticular cells do?

Aid in maturation of T cells and produce cytokines

15

Where are Hassall's corpuscles found?

In the medulla of the the thymus gland

16

What is produced in the Bursa of Fabricius?

B cell precursors and immature B cells

17

What are GALT, BALT, MALT, and NALT?

Lymphoid tissue associated with the gut, bronchus, mucosal tissue, and nasal tissue, all secondary lymphoid tissues

18

Where in the lymph node are lymphocytes kept?

B cells: Germinal centers of follicles
T cells: Paracortical zone (Outside follicle)

19

How are lymph nodes supplied with blood?

Arterioles that enter at the hilus, high endothelial vessels

20

What is special about a pig's lymph nodes?

The cortex and medulla are inverted

21

What aquatic bird species have lymph nodes?

Ducks, geese

22

What are the components of splenic white pulp?

Germinal center (With B cells), lymphoid follicle, periarteriolar lymphoid sheath (With T cells), mantle zone, perifollicular/perilymphoid red pulp

23

What are the components of splenic red pulp?

Splenic sinuses, splenic cords, and reticulin fibers

24

If Peyer's patches are seen, what section of the intestines is being looked at?

The ileum

25

What blind-ended tubular sac also contains lymphoid follicles similar to the ileum?

The appendix, contains mostly B cells but some T cells