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Lymphatic System
EXAM 3
29
Anatomy
Not Applicable
03/26/2012

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Cards

Term
What are the functions of the lymphatic system?
Definition
To return protein-containg fluid from the tissue to the blood.
Transport chylomicrons from the intestines into the blood and the immune system.
Production of lymphocytes, phagocytosis of bacteria, and secretion of antibodiess.
Transports lipoproteins from small intestine to the blood.
Term
How is lymph different from blood plasma?
Definition
Lymph has much less protein and many more WBCs especially lymphocytes.
Term
Lymphatic vessels originate as what?
Definition
Lymphatic capillaries
Term
After lymph seeps into the tubes, the tubes start to converge into larger vessels known as what?
Definition
Lymphatics
Term
All of the lymph in the body will eventually empty into what two pathways?
Definition
1. the thoracic duct
2. right lymphatic duct
Term
What is the Cisterna chyli?
Definition
The enlarged proximal end of the thoracic duct
Term
The thoracic duct receives lymph from where?
Definition
upper left side of the body and everything below the diaphragm
Term
From the thoracic duct where does it empty the lymph?
Definition
the left subclavian vein
Term
The right lymphatic duct receive lymph from where?
Definition
the right side of the upper body
Term
From the right lymphatic vein where does it empty the lymph?
Definition
the right subclavian vein
Term
Describe a lymph node
Definition
Oval or bean shaped, indented on one side with an outer fibrous capsule
Term
What forms the lymph sinuses?
Definition
the connective tissue of the fibrous capsule (of the lymph node) extending into the node
Term
Lymph sinuses contain what kinds of cells?
Definition
large number of macrophages, large number of lymphocytes, B cells and helper T cells
Term
__ cells help ___ cells secrete antibodies.
Definition
helper T cells, help B cells secrete antibodies
Term
What regions of the body are there high concentrations of lymph nodes?
Definition
Cervical, Axillary, and inguinal regions.
Term
Lymph nodes may swell as a result of what?
Definition
a bacterial infection
Term
What causes lymph to flow?
Definition
the muscular pump and respiratory pump
Term
How many liters of lymph circulate per day?
Definition
3-4 liters
Term
To fight an infection you want to slow down lymph flow, how do you do this?
Definition
rest
Term
Where is the spleen found?
Definition
just under the diaphragm on the left side
Term
The spleen is similar to what?
Definition
lymph nodes
Term
The spleen does for _____ what lymph nodes do to lymph.
Definition
blood
Term
The phagocytizes old ____.
Definition
RBCs
Term
Can you survive without a spleen?
Definition
yes
Term
Without a spleen what happens?
Definition
You will have a higher incidence of infection from encapsulated bacteria for example pneumonia
Term
The spleen can act as an emergency ____ ____.
Definition
blood reservoir
Term
Describe the thymus gland
Definition
bilobed organ in the mediastinum, often on the top of the heart, largest in childhood and adolescence then degenerates.
Term
What happens to the thymus by the time a person is in his/her 30s?
Definition
the thymus is really hard to find
Term
What is the role of the thymus?
Definition
to produce T cells (a type of lmphocyte)
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