Lymph and immune system

Question 1

what is the function of the lymph system?

Answer 1

to restore interstitial tissue fluid to the blood

to filter pathogens targeted by the immune system

Question 2

pathway of flow of lymph

Answer 2

from capillary beds, interstitial fluid enters lymph capillaries, called lymph, moves through lymph nodes and vessels toward the heart and dumps into the veins in the upper neck/thorax.

Question 3

components of the lymph system gross

Answer 3

lymph vessels-
endothelium wall, valves exist like in veins, Lymph nodes
Contains reticular CT
(with reticular fibers)
- Lymph flows through
- Pathogens are filtered out by immune cells

Question 4

Leukocytes

Answer 4

these are white blood cells, immune cells, most are located in the lymph system

Question 5

what are they types of leukocytes

Answer 5

Macrophages- engulf foriegn cells, marks them with antigen , not specific to one type of antigen
Lymphocytes- - Recognizes & attacks one specific type of antigen
- Must be activated first (e.g. by macrophage)

Question 6

Lymphoid tissue

Answer 6

Common in places where pathogens may enter e.g. MALT in the mucous producing organ systems of the digestive, urinary, reproductive tracts

Question 7

Lymphoid organs

Answer 7

- Primary lymphoid organs
(where lymphocytes are made
-Secondary lymphoid organs
(contain mature lymphocytes)
•  Lymph nodes •  Spleen
•  Tonsils •  Peyer’s
•  Appendix