Term
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Definition
Function as a type of filter.
1. Foreign substances are filtered and trapped by nodal reticular fibers.
2. Macrophages destroy some foreign substances by phagocytosis.
3. Lymphocytes destroy other foreign substances by immune responses. |
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Definition
| Contain T cells, B cells, macrophages, and follicular dendritic cells. Site of proliferation of plasma cells and T cells. |
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Definition
| Composed of dense connective tissue that surrounds the thymus, lymph nodes, and spleen. |
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Definition
| Drains the lower half of the body from the umbilical down. |
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Definition
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Definition
-Capsular extensions that divide the node into compartments. -Provide support.
-Provide a route for blood vessels into the interior of a node. |
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Definition
| Egg-shaped aggregates of B cells. Not surrounded by a capsule. |
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Term
| Primary/Secondary Lymphatic Nodule |
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Definition
Primary - consists primarily of B Cells. After B cells recognize an antigen, the primary lymphatic nodule develops into a secondary lymphatic nodule.
Secondary - found in the outer cortex. Form in response to an antigen and is the site of plasma cell and memory B cell formation. |
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Term
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Definition
| Contains B cells, antibody producing plasma cells, and macrophages. Embedded in a network of reticular fibers and reticular cells. |
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Definition
| Center of a secondary lymphatic nodule that contains a region of light staining cells. Contains B cells, follicular dendritic cells, and macrophages. Site of B cell proliferation and differentiation. |
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Term
| Afferent Lymphatic Vessels |
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Definition
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Term
| Efferent Lymphatic Vessels |
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Definition
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Definition
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Definition
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Definition
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Definition
| Irregular channels that contain branching reticular fibers, lymphocytes, and macrophages. |
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Definition
| Thoracic duct and the right lymphatic duct. |
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Definition
| Anterior to L2. Receives lymph from the right and left lumbar trunks and the intestinal trunk. |
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Term
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Definition
| Receives lymph from the left side of the head, neck, and chest, the left upper limb, and the entire body inferior to the ribs. Begins at the cisterna chyli and drains into the left subclavian vein. |
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Definition
| Receives lymph from the upper right side of the body and drains into the right subclavian vein. |
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Term
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Definition
-Greater permeability than blood capillaries.
-Can absorb proteins and lipids.
-Slightly larger in diameter than blood capillaries.
-Unique one-way structure.
-Anchoring filaments that contain elastic fibers. |
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Definition
| Specialized lymphatic capillaries in the small intestine that carry dietary lipids into lymphatic vessels and into the blood. The lymph is called chylomicron. |
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Definition
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Definition
| Largest mass of lymphatic tissue. |
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Definition
| Consists of venous sinuses and splenic cords that consists of red blood cells, macrophages, lymphocytes, plasma cells, and granulocytes. |
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Term
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Definition
1. Removal of ruptured, worn out, or defective blood cells and platelets by macrophages.
2. Storage of platelets.
3. Production of blood cells during fetal life. |
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Definition
| Lymphatic tissue consisting mostly of lymphocytes (B cells and T cell) and macrophages arranged around a central arteries. |
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Term
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Definition
1. B cells and T cells carry out immune functions.
2. Macrophages destroy blood-borne pathogens by phagocytosis. |
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Term
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Definition
-Cortex composed of T cells, dendritic cells, epithelial cells, macrophages.
-Immature T cells migrate from the red bone marrow to the cortex of the thymus where they proliferate and mature. |
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Term
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Definition
| Derived from monocytes and play a key role in immune responses. |
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Term
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Definition
| Help clear out debris of dead and dying cells. |
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Term
| Thymic (Hassal's) Corpuscles |
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Definition
| Clusters of epithelial cells that degenerate and become filled with keratohyalin granules and keratin. Sites of T cell death. |
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Definition
| Trabeule of the lobes penetrate inward and divide the lobes into lobules. |
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Definition
| Participate in immune responses against inhaled or ingested foreign substances. |
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Term
| Pharyngeal Tonsil (Adenoid) |
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Definition
| Embedded in the posterior wall of the nasopharynx. |
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Definition
| Lie at the posterior region of the oral cavity. |
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Definition
| Located at the base of the tongue. |
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