Lymphatic System: Questions
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Water moves from the blood capillary into the interstitial space (tissue space) due to:
blood pressure (called hydrostatic pressure).
10 - 15% of the water moved out into the interstitial space (tissue space) is absorbed by the:
Lymphatic capillaries
What happens to the 85-90% of the water pushed into the interstitial space (tissue space)?
Reabsorbed in the blood capillaries by osmosis.
Fluid being returned to the blood system is checked by the lymphatic system for ___________________.
Toxins, microbes and other threats.
The lymphatic system not only checks the lymph but also guards openings of the:
Digestive and Respiratory tracts. Example: the tonsils.
Special lymphatic capillaries located in the small intestine are called:
Lacteals
What do the lacteals transport from the digestive system?
Dietary lipids
Lymph capillaries are found in:
Most of the body’s tissues near blood capillaries.
What are the two names of the lymphatic collecting ducts?
• Right lymphatic duct • Thoracic duct
What fluids drain into the right lymphatic duct?
Fluids from the: • Right side of head • Right side of neck • Right side of chest • Right upper limb
What fluids drain into the thoracic duct?
Fluids from the: • Left side of head • Left side of chest • Left upper limb • Rest of body
Both the right lymphatic and thoracic duct empty into the:
subclavian veins (under the bones called the clavicles).
As lymph moves through the lymph system, what functions to filter and cleanse the lymph?
Lymph nodes
Macrophages are found within the lymph nodes. What is the function of macrophages?
To “eat” phagocytize the pathogens and cellular debris of lymph.
Lymphocytes are found within the lymph nodes. What is the function of lymphocytes?
Detect foreign pathogens and activate the immune system.
Axillary lymph nodes would be found in the __________.
Armpit
Mediastinal lymph nodes would be found in the _________.
Thoracic cavity
Inguinal lymph nodes would be found in the ___________.
Groin
Cervical lymph nodes would be found in the ____________.
Neck
We learned the term “afferent” in the nervous system. What does afferent mean?
Traveling towards something.
A lymph vessel that brings lymph towards a lymph node is called an __________________.
Afferent lymph vessel
We learned the term “efferent” in the nervous system. What does efferent mean?
Traveling away from something
What would a lymph vessel that transports lymph away from the lymph node be called?
Efferent lymph vessel
Arrange the following in order of flow: - channels through sinuses of lymph node - afferent lymph vessels - efferent lymph vessels
• afferent lymph vessels bring lymph into lymph node. • lymph travels in channels through sinuses in the node. • cleansed lymph leaves the lymph node via efferent lymph vessels.