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18 Cards in this Set

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What are the THREE functions of the lymphatic system?
Maintain fluid balance in tissue

Fight disease

Absorb fats from the digestive system
Which lymphatic organs function is to provide a place where phagocytic cells are eaten up?
Lymph nodes
Which lymphatic organs function is primarily to break down old red blood cells?
Spleen
Which lymphatic organs function is to be the birthplace for T cells?
Thymus
Which lymphatic organs function is to be the first line of defense for the nasal and oral areas of the body?
Tonsils
What is lymph? what is it made up of?
Lymph is the interstitial fluid collected in the lymph vessels. It contains PROTEINS, MICROORGANISMS, FATS.
How is lymph circulated through the body?
Lymph flows TOWARD THE HEART ONLY! thus it is NOT a closed system (like the circulatory system) instead it is a one-way system.
How is lymph circulated to the largest veins in the body?
RECALL THERE IS NO PRESSURE IN LYMPH VESSELS!

Lymph vessels must rely on their valves to push lymph throughout the body.
What do we know about the lymph systems regenerability?
Lymph nodes and vessels can be regenerated.
Lymphatic capillaries

-AKA
-made up of
-Found mostly in
-function to
lacteal capillaries

one layer of endothelial lining

Digestive system

Function to pull ONLY FAT from the intestines (mostly small) into the liver (via hepatic portal vein).
Why are lymphatic capillaries interlaced with regular capillaries?
So that they can abstract the rest of the nutrients (proteins, sugars).
What are lymph ducts?
largest lymph transporters that collect lymph from lymph nodes and lymph trunks and return it to the circulatory system
How many main lymph ducts are their? what are their names?
2;

Thoracic duct
Right lymphatic duct
Thoracic duct

- size of the duct (relative to right lymphatic duct)
-will empty interstitial fluid from what % of the body
-where specifically will it collect fluid
-what vein(s) will it return it to the circulatory system.
Largest lymph duct in the body

75%

left side of the body, brain, and arm as well as the bottom of the body.
Right lymphatic duct

- size of the duct (relative to thoracic duct)
-will empty interstitial fluid from what % of the body
-where specifically will it collect fluid
-what vein(s) will it return it to the circulatory system.
smaller than thoracic

25%

Right side of the body, arm and the whole upper part of the body (head, neck).
What vein will the thoracic duct return fluid to the circulatory system?

Right lymphatic duct?
Thoracic duct- in the left subclavian (enters along with jugular vein).

Right lymphatic- Right subclavian (where the jugular enters as well).
What are lymph nodes?
As we said earlier where phagocytes are destroyed.
If lymph only travels in one direction... what are afferent and efferent lymph vessels?
Lymph enters lymph nodes through afferent vessels (further from the heart) and exit the same lymph node through efferent lymph vessels