Term
| Where is the beginning of the lymphatic system? |
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Definition
| The lymphatic system begins in the capillary bed where it collects interstitial fluid |
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Term
| What is the name of the fluid carried by the lymphatic system? |
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Definition
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Term
| What percentage of fluid lost in the capillaries returns in the venous blood supply? |
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Definition
| 80-90%, but even the relatively small amount that remains would accumulate rapidly if not for the lymphatic system |
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Term
| Why are lymphatic vessels not distributed evenly throughout the body? |
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Definition
since the lymphatic system is a primary component of host defense it is concentrated around areas of possible infection
lymphatic vessels are sparse in muscle and fascia and absent in avascular tissue |
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Term
| what cells live in lymphnodes? |
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Definition
| t and b lymphocytes and macrophages |
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Term
| What do afferent lymphatic vessels do? |
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Definition
| Bring lymph to lymphnodes |
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Term
| what do efferent lymph vessels do? |
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Definition
| Take lymph away from lymphnodes |
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Term
| What are Peyer's Patches? |
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Definition
| collection of lymph nodes in the intenstines. (typically the ileum) |
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Term
| Are lymph nodes in bone tissue? |
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Definition
| Yes, bonemarrow produces lymphocytes |
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Term
| What are the two lymphoid organs? |
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Definition
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Term
| Why is it hard to find the thymus in adults? |
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Definition
| The thymus begins to die around 13-14 |
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Term
| Where does the lymph from the mammary glands end up? What is the clinical significance |
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Definition
| Lymph goes to the subclavian trunk. Breast cancer is particularly dangerous because it can quickly spread to the lymph nodes |
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Term
| Where does the lymph from the head and neck collect? |
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Definition
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Term
| Where are the lymph nodes of the lung concentrated? |
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Definition
| Right and left Mediastinal Trunk |
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Term
| What are the lymph nodes of the lower extremities? |
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Definition
| Inguinal nodes (superficial and deep) |
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Term
| What is the Cisterna Chyli |
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Definition
| The collecting lymphoid tissue that gets the lymph from the lower extremities and intestinal trunk and send it to the thoracic duct |
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Term
| What is the largest lymphatic vessel in the body? |
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Definition
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Term
| What part of the body is covered by the right lymphatic duct? |
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Definition
Upper right section of the trunk, right arm, right half of head and neck.
In some individuals, the lower lobe of the left lung |
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Term
| What does the thoracic duct cover? |
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Definition
| All of the lower half of the body as well as the upper left hand half of the body |
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Term
| What are the functions of the lymphatic system? |
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Definition
Filtration of lymph,
absorption and transfer of fat,
drainage of tissue fluid and macromolecules back into circulation |
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Term
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Definition
Some smooth muscle in lymphatic vessels but also through:
compression of vessels due to contraction of surrounding tissue,
negative pressure (thorax),
gravity (head and neck),
pulsation of arteries |
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Term
| Why do lymphatic vessels have valves? |
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Definition
| Most lymph flows up the body, the valves prevent back flow |
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Term
[image]
Identify the lymphnodes |
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Definition
1. Deltopectoral nodes
2. Axillary nodes
3. Cubital nodes |
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