Histo- lymphatics

Question 1

Major functions of the lymphatic system:

Answer 1

1) Drain Excess Interstitial Fluid – return to blood stream to help maintain normal blood volume
2) Immune Response – produce, maintain, and distribute lymphocytes
3) Provide an Alternative Transportation Route for Hormones, Nutrients, and Waste Products

Question 2

what are the different types of lymphocytes:

Answer 2

A) B cells
B) T cells
C) NK (natural killa) cells

Question 3

Diffuse lymphatic tissue consists of what?

Answer 3

Accumulations of lymphocytes in the lamina propria of the alimentary canal, as well as respiratory, urinary, and reproductive tracts.

-No surrounding capsule

Question 4

Lymphatic Nodules (a.k.a. Lymphatic Follicles) consist of what?

Answer 4

Accumulations of lymphocytes in the wall of alimentary canal, as well as respiratory, urinary, and reproductive tracts. (just like diffuse lymphatic tissue)

Question 5

what are primary & secondary lymphatic nodules made of?

Answer 5

Primary- aggregation of primarily small lymphocytes

Secondary- will have a germinal center and a mantle zone

Question 6

Tonsils, peyer’s patches & the veriform appendix are all examples of _________

Answer 6

lymphatic nodules

Question 7

what does MALT stand for? BALT? GALT?

Answer 7

MALT: Mucus-Associated Lymphatic Tissue

BALT: Bronchus-Associated Lymphatic tissue

GALT: Gut-associated lymphatic tissue

Question 8

Lymph nodes are _______ ______ along pathway of lymphatic vessels

Answer 8

Capsuled organs

Question 9

what are the parts of the Lymph node cortex?

Answer 9

A. superficial (nodular) cortex

B. deep cortex (paracortex)

Question 10

the superficial (nodular) cortex of the Lymph node contains what?

Answer 10

1) lymphatic nodules (primary & secondary)

2) germinal centers

Question 11

the medulla of the lymph nodes is made of medullary ______ and _______

Answer 11

medullary cords

medullary sinuses

Question 12

Cells of Reticular Meshwork in lymph nodes:

Answer 12

1) Reticular cells
2) Dendritic cells (DCs)
3) Macrophages
4) Follicular dendritic cells

Question 13

________ are extensions between cortex’s of lymph nodes

Answer 13

trebecula

Question 14

The flow of lymph through the lymph node:

Answer 14

Afferent Lymph Vessel

Subcapsular (Cortical) Sinus

Trabecular Sinus

Medullary Sinus

Efferent Lymph Vessel

Question 15

The thymus is the site of ____________, where T cells mature

Answer 15

thymic cell education

Question 16

Function of the Spleen:

Answer 16

Filters and monitors the blood immunologically just as the lymph nodes monitor lymph.

Question 17

The spleen consists of:

Answer 17

Red & white pulp

Question 18

the red pulp of the spleen consists of what?

Answer 18

consists of blood-filled venous sinuses (splenic sinuses)

surrounded by cords of splenic tissue called splenic (Billroth’s) cords

Question 19

the white pulp of the spleen consists of what?

Answer 19

lymphatic tissue consisting mostly of lymphocytes

lymphocytes aggregate around branches of splenic artery (called central arteries)
-creates a periarterial lymphatic sheath (PALS)

Question 20

red pulp’s primary role is __________

Answer 20

blood filtration

Question 21

the white pulp carries out what type of functions?

Answer 21

immune functions similar to lymph nodes.