59 Questions
What is the main function of lymphatic capillaries in the GI tract?
Absorb lipid-soluble substances from the GI tract
What helps anchor endothelial cells of lymphatic capillaries to nearby structures?
Anchoring filaments
What is the driving force that moves fluid into the lymphatic capillaries?
Increase in interstitial hydrostatic pressure
Which term best describes lipid droplets enveloped within protein that are absorbed by the lacteals?
Chylomicrons
In which scenario would interstitial fluid enter the lymphatic capillary lumen?
When interstitial fluid hydrostatic pressure exceeds lymph hydrostatic pressure
What is absorbed by the lacteals in the small intestine that cannot enter the blood directly from the GI tract?
Dietary lipids and lipid-soluble vitamins
Where does the right lymphatic duct return lymph to the venous circulation?
The junction of the right subclavian vein and the right internal jugular vein
Which of the following areas does the right lymphatic duct drain lymph from?
The right side of the head and neck, the right upper limb, and the right side of the thorax
What is the other name for the largest lymph vessels that the lymphatic trunks drain into?
Lymphatic ducts
How many lymphatic ducts are there in the body?
2
What is the purpose of the lymphatic ducts?
To convey lymph back into the venous circulation
What might occur if a group of lymph nodes and their associated lymph vessels are surgically removed, as might happen with breast cancer metastasis?
Lymphatic drainage would be disrupted, leading to lymphedema
What is the primary function of the lymphatic system?
To transport lymph, a fluid containing white blood cells, proteins, and other substances
Where does lymph originate?
In the interstitial fluid surrounding tissue cells
What is the difference between lymph vessels and lymphatic vessels?
Lymph vessels refer to any type of vessel in the lymphatic system, while lymphatic vessels specifically refer to vessels between lymphatic capillaries and lymphatic trunks
What is the primary function of lymphatic capillaries?
To allow fluid entry from the interstitial space into the lymphatic system
Which of the following is a component of the lymphatic system?
All of the above
What is the primary function of lymphoid structures in the lymphatic system?
To produce and mature lymphocytes
What is the approximate volume of interstitial fluid that is not reabsorbed back into the blood capillaries daily?
3 liters
What is the main component of lymph besides water and dissolved solutes?
Proteins
What is the process called when cancerous cells from a primary tumor spread to other locations in the body?
Metastasis
What is the relationship between lymphatic capillaries and larger lymph vessels?
Lymphatic capillaries merge to form larger lymph vessels.
What is the normal function of the lymphatic system in relation to interstitial fluid?
The lymphatic system removes excess interstitial fluid from the body.
What is the primary mechanism that assists in the movement of lymph through the lymphatic vessels?
All of the above mechanisms contribute to lymph movement
What is the purpose of valves within lymphatic vessels?
To prevent the backflow of lymph, ensuring one-way movement
Which of the following lymphatic trunks drains lymph from the lower limbs, abdominopelvic wall, and pelvic organs?
Lumbar trunks
What is the primary function of lymph nodes in the lymphatic system?
To filter out foreign or pathogenic material as lymph passes through them
Which of the following lymphatic trunks drains lymph from the head and neck region?
Jugular trunks
What is the primary function of the lymphatic system?
To return interstitial fluid to the blood circulation
What is the primary function of lymphatic capillaries in the lymphatic system?
Transporting lymph from tissue to blood
Which component of the lymphatic system is involved in the formation and maturation of lymphocytes?
Primary lymphoid structures
What is the process called when fluid from the interstitial space moves into the lymphatic capillaries?
Filtration
Which statement best describes the difference between primary and secondary lymphoid structures?
Primary structures house lymphocytes while secondary structures form lymph.
What assists in anchoring endothelial cells of lymphatic capillaries to nearby structures?
Protein filaments called anchoring filaments
Which term describes the largest type of vessel within the lymphatic system that connects to lymphatic trunks?
Lymphatic duct
What prevents the collapse of lymphatic capillaries as pressure from interstitial fluid increases?
The anchoring filaments between lymphatic capillary cells and surrounding tissue
How is fluid movement into lymphatic capillaries analogous to a household entryway door?
The door opens when pressure is applied to the inside surface
What forces endothelial cells of lymphatic capillaries to close, trapping the lymph within?
Pressure from the surrounding tissue
Which vessels are included in the network through which lymph is transported?
Lymphatic capillaries, lymphatic vessels, lymphatic trunks, and lymphatic ducts
What causes the lymph to become trapped within the lymphatic capillary?
Pressure exerted by interstitial fluid on the outside of capillaries
What is the next type of vessel after lymphatic vessels in the network for transporting lymph?
Lymphatic trunks
What is the primary cause of obstructive lymphedema?
Trauma or infection of the lymph vessels
What is the main effect of untreated lymphedema on the affected area?
Increased protein-rich fluid buildup and risk of infection
Which of the following is a common treatment for lymphedema?
Compression garments and massage
What is the primary cause of lymphedema in Southeast Asia and Africa?
Parasitic filarial worms
Which of the following is NOT a common cause of obstructive lymphedema?
Increased production of interstitial fluid
What is the main function of compression garments in the treatment of lymphedema?
Reduce swelling and assist in fluid return to circulation
What is the length of the thoracic duct?
37.5 to 45 centimeters
Where does the right lymphatic duct drain lymph from?
Right upper quadrant of the body
What structure receives milky, lipid-rich lymph called chyle?
Cisterna chyli
Which region does the thoracic duct primarily drain lymph from?
Left thorax
What is the rounded saclike structure anterior to the L2 vertebra?
Cisterna chyli
Which area is NOT drained by the thoracic duct?
Right upper limb
What is the primary component of lymph, besides water and dissolved solutes?
Proteins
What process is described when cancerous cells from a primary tumor spread to other locations in the body?
Metastasis
What is the approximate daily volume of interstitial fluid that is not reabsorbed back into the blood capillaries?
3 liters
What happens to the interstitial fluid once it enters the lymphatic capillaries?
It is called lymph
Which of the following components is not mentioned as being present in lymph?
Red blood cells
If cancerous cells from a primary breast tumor spread to the lungs via the lymphatic system, what would the cancerous cells in the lungs be called?
Metastasized breast cancer
Explore the basics of the lymphatic system including lymph vessels and lymphoid structures. Learn about the formation, characteristics, and transport of lymph through different vessels until it is returned to the cardiovascular system.
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