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Lymphatic System
Lymphatic System vocabulary terms pages 390-395
| Term | Definition |
|---|---|
| Lymphatic system | the network of vessels through which lymph drains from the tissues into the blood. |
| Edema | a condition characterized by an excess of watery fluid collecting in the cavities or tissues of the body. |
| Lymphatic vessel | The lymphatic vessels are thin-walled vessels structured like blood vessels, that carry lymph. As part of the lymphatic system, lymph vessels are complementary to the cardiovascular system.These vessels drain into the right and left subclavian veins. |
| lymph | a colorless fluid containing white blood cells, which bathes the tissues and drains through the lymphatic system into the bloodstream. |
| lymph capillaries | Lymph capillaries or lymphatic capillaries are tiny, thin-walled micro-vessels located in the spaces between cells which serve to drain and process extracellular fluid. |
| Right lymphatic duct | a short vessel that receives lymph from the right side of the head, neck, and thorax, the right arm, right lung, right side of the heart |
| Thoracic duct | the main vessel of the lymphatic system, passing upward in front of the spine and draining into the left innominate vein near the base of the neck. |
| lymph nodes | each of a number of small swellings in the lymphatic system where lymph is filtered and lymphocytes are formed. |
| macrophages | a large phagocytic cell found in stationary form in the tissues or as a mobile white blood cell, especially at sites of infection. |
| lymphocytes | a form of small leukocyte (white blood cell) with a single round nucleus, occurring especially in the lymphatic system. |
| cortex | an outer layer of another organ or body part such as a kidney, the cerebellum, or a hair. |
| follicles | a small secretory cavity, sac, or gland. |
| germinal clusters | clusters of rapidly proliferating B cells found in secondary lymphoid tissues. high endothelial venues: vessels containing unique endothelial cells specialized to allow migration of lymphocytes from the blood to the lymph node. |
| plasma cells | a fully differentiated B cell that produces a single type of antibody. |
| medulla | the inner region of an organ or tissue, especially when it is distinguishable from the outer region or cortex (as in a kidney, an adrenal gland, or hair). |
| afferent lymphatic vessels | Lymph vessels that carry lymph to a lymph node are called afferent lymph vessels, and those that carry it from a lymph node are called efferent lymph vessels |
| sinuses | an irregular venous or lymphatic cavity, reservoir, or dilated vessel. |
| hilus | an indentation in the surface of a kidney, spleen, or other organ, where blood vessels, ducts, nerve fibers, etc. enter or leave it. |
| efferent lymphatic vessels | Lymph vessels that carry lymph to a lymph node are called afferent lymph vessels, and those that carry it from a lymph node are called efferent lymph vessels |
| spleen | an abdominal organ involved in the production and removal of blood cells in most vertebrates and forming part of the immune system. |
| thymus gland | a lymphoid organ situated in the neck of vertebrates that produces T cells for the immune system. The human thymus becomes much smaller at the approach of puberty. |
| tonsils | either of two small masses of lymphoid tissue in the throat, one on each side of the root of the tongue. |
| Peyer's patches | Peyer's patches are small masses of lymphatic tissue found throughout the ileum region of the small intestine |
| MALT | mucosa-associated lymphoid tissue |
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