Lymphatics 112 Final Wilson

Question 1

Lymph

Answer 1

Fluid that is picked up by lymphatic vessels`

Question 2

Lymph Nodes

Answer 2

Principal lymphoid organs of the body

Question 3

Lymphatic trunk,

Answer 3

Drain fairly large areas of the body; formed by the largest collecting vessels uniting

Question 4

Lymphatic duct,

Answer 4

Area that receives lymphatic drainage

Question 5

lymphatics,

Answer 5

Elaborate networks of drainage vessels that collect eh excess protein-containing interstitial fluid and return it to the bloodstream

Question 6

afferent /efferent lymphatic vessels,

Answer 6

• Afferent lymphatic vessels is where the lymph enters the node
• Efferent lymphatic vessels is where the lymph exits the node

Question 7

MALT (mucosae associated lymphoid tissue)

Answer 7

Protects the digestive and respiratory systems from foreign matter

Question 8

Hilum

Answer 8

The indented region on the concave side of node

Question 9

Cortex

Answer 9

(outer) contains densely packed lymphocytes and scattered macrophages

Question 10

Medulla

Answer 10

(inner) contains fewer lymphocytes and thymic (Hassall’s) corpusles

Question 11

capsule trabeculae,

Answer 11

extends to divide the node into a number of compartments

Question 12

Stroma

Answer 12

The network that supports the other cell types in lymphoid organs and tissues

Question 13

Lacteals

Answer 13

Set of lymphatic capillaries that transport absorbed fat from the small intestine to the bloodstream

Question 14

Peyer’s patch

Answer 14

(aggregated lymphoid nodules) large clusters of lymphoid follicles, structurally similar to the tonsils

Question 15

metastatic cancer sites

Answer 15

lymph nodes

Question 16

ruptured spleen,

Answer 16

blood spills into the peritoneal cavity. Can often repair itself.

Question 17

role of lymph system

Answer 17

• Fluid balance (lymphatic vessels/system)
• Immunity/defense (lymphoid organs)
• Nutrition/digestion (lacteals; found in gastro tract)

Question 18

organs in system,

Answer 18

• Spleen (largest lymph organ)
• Thymus
• Tonsils (simplest lymphoid organ)
• Peyer’s patches (in intestine)
• Appendix

Question 19

permeability of lymph capillaries,

Answer 19

• Endothelial cells forming the walls of lymphatic capillaries are not tightly joined
• Collagen filaments anchor the endothelial cells to surrounding structures so that any increase in interstitial fluid volume opens the mini valves

Question 20

flow of lymph (from capillaries to what to what, etc.),

Answer 20

capillaries  vessels  trunks  ducts

Question 21

where does lymph drain?

Answer 21

Into the large neck veins of the cardiovascular system
• thoracic duct into left subclavian trunk
• right lymphatic duct drains into right subclavian trunk

Question 22

How is it drained from each side of the body?,

Answer 22

• Thoracic duct: receives lymph from all of body EXCEPT right upper limb and right side of head and thorax.
• Right lymphatic duct: drains lymph from the right upper limb and right side of head and thorax

Question 23

5 cell types found in lymph tissue/roles of each

Answer 23

• Lymphocytes (mature into T cells or B cells): Protect against antigens
• Plasma cells: secrete antibodies
• Macrophages: Phagocytosis; active T cells
• Dendritic cells: spiny; capture antigens and deliver to nodes
• Reticular cells: fibroblast-like; produces stroma reticular fiber network in lymph organs.

Question 24

role/anatomy spleen

Answer 24

site for lymphocyte proliferation and immune surveillance and response

• 5 inch organ between stomach & diaphragm
• Stroma consists of capsule, trabeculae, fibers, and fibroblasts
• Parenchyma consists of white pulp and red pulp
o White pulp: where immune function takes place
o Red pulp: where worn-out RBC’s and blood borne pathogens are destroyed

Question 25

role/anatomy thymus (how does thymus different from other lymph organs?),

Answer 25

Where T lymphocytes become able to defend us against specific pathogens in the immune response
• Description: 2 lobed organ located in mediastinum
• Structure: Capsule & trabeculae divide it into lobules with medulla and cortex
• Hassall’s corpusles
- Increases in size and is most active during childhood
- stops growing during adolescence and then gradually atrophies

Question 26

role/anatomy tonsils

Answer 26

• Simplest lymphoid organs

* Crypts trap and destroy bacteria and particulate matter