Term
| What are the two roles of the Lymphatic System? |
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Definition
1. Return Fluid to blood
2. Immune protection |
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Term
| What is the difference between interstitial fluid and Lymphatic Fluid? |
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Definition
Interstitial fluid is the fluid that leaves the blood and stays in the tissue.
Once Interstitial fluid enters the lymphatic vessels it is called Lymph |
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Term
| What makes lymphatic capillaries so permeable? |
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Definition
| The cells of the capillaries form mini on-way valves that make the vessel permeable to fluid as well as debris, pathogens, and cancer. |
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Term
What is the order in which Lymph flows through the Lymphatic structures?
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Definition
Lymphatic Capillaries-->Lymphatic vessels-->
lymphatic trunks-->lymphatic ducts
Lymphatic ducts return lymph to the blood |
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Term
| What are the major regions in which lymph nodes are found? |
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Definition
Cervical: around neck
Axillary: around arm pits
Inguinal: around the groin |
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Term
| How does lymph move through the body to be returned to the blood? |
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Definition
Lymph moves through the body via the
"Respiratory Pump", "Skeletal Muscle Pump", and smooth muscle within the lymphatic vessels which contract rythmically to move the fluid.
Lymph Vessels also contain one way valves to keep the fluid moving the right way. |
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Term
What area of the body does the Right Lymphatic duct serve?
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Definition
| The right lymphatic duct drains lymph coming from the right side of the head, right upper limb, and right side of thorax. |
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Term
| What part of the body does the Thoracic duct serve? |
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Definition
| The thoracic duct drains left side of the head, left upper limb, left side of thorax and the rest of the body. |
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Term
| Where do the lymphatic ducts drain into? |
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Definition
| The Right and Left Subclavian veins |
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Term
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Definition
Lymphedema is swelling of the tissues does to poor lymph drainage.
Too much fluid from the blood is left in the tissues. |
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Term
| What types of cells are found in the lymphatic system to clean the blood? |
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Definition
| Lymphocytes and Macrophages |
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Term
| What two types of lymphatic organs cleanse the blood? |
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Definition
| Lymph nodes and the Spleen |
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Term
Describe how a lymph node works
(be sure to mention afferent and efferent vessels) |
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Definition
Lymph enters the nodes via affarent vessels and leaves the nodes via efferent vessels
There are more affarent vessels than there are efferent vessels which slows the lymph down so that macrophages and lymphocytes have time to cleanse it of debris and pathogens.
There are 450 nodes/person and the lymph goes through several of these nodes before returning to the blood. |
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Term
| What are the roles of macrophages (red pulp) found within the spleen? |
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Definition
- Remove and phagocytize old RBCs from the blood stream
- Cleanse blood of debris and pathogens
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Term
| What are the roles of lymphoctyes (white pulp) within the spleen? |
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Definition
| Lymphoctyes destroy and inactivate pathogens. |
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Term
| Why do lymph nodes become swollen? |
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Definition
| Lymph nodes become swollen during and infection or illness due to inflammation and multiplication of WBCs. |
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