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27 Cards in this Set
- Front
- Back
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The lymphatic system.
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This system is made up of lymphatic vessels and lymphatic tissues.
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The purpose of the lymphatic system.
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This system collects the fluid lost from capillaries and returns it to the circulation. It also houses phagocytes and lymphocytes which play a role in the immune system.
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Lymph fluid.
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When the fluid enters the lymphatic vessels it is called this.
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Lymph nodes.
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Here the lymph is cleaned and examined by immune cells for pathogens.
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Difference between blood and lymph vessels carrying abilities.
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The lymph vessels can take up cells, proteins, debris, ect. unlike blood vessels.
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The location where lymphatic vessels empty the lymph back into venous circulation.
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The junction of the internal jugular vein and subclavian vein on its own side of the body.
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The amount of lymph that travels through the lymphatic system.
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3L of this travel through here every 24 hours.
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Lymphocytes.
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Main cells of the immune system and come from the red bone marrow. The come from stem cells and turn into T and B Cells.
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T Cells.
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These cells manage the immune system and some directly attack and destroy infected cells.
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B Cells.
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These proliferate and become plasma cells that produce antibodies.
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Antigens.
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Anything the body percieves as foreign (bacteria, mismatched RBCs, cancer cells, viruses, and toxins).
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Antibodies.
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This imobilize antibodies until they can be destroyed.
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The roles of lymphoid tissues.
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1. House and provide a proliferation site for lymphocytes.
2. Give a surveillance site to examine and clean the lymph fluid. |
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Lymph nodes.
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The principle lymph organs. They have a medulla and a cortex. These cluster among lymph vessels and are embedded in connective tissue.
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Locations of lymph node clusters.
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These are found in the cervical, axillary, and inguinal areas.
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Buboes.
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When lymph nodes become infected and visable.
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Bubonic Plague.
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Also known as Black death, killed 1/4 of Europe in middle ages. Symptom includes buboes.
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This also happens at lymph nodes.
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They are the site where metasizing cancers live and spread. Cancer infected nodes are sually swollen but not painful.
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Lymph organs.
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Tonsils, spleen, thymus, peyer's patches, and the appendix.
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Functions of the spleen.
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1. It stores the breakdown products of RBCs for later use.
2. It is a site of RBC production in the fetus. 3. It stores platelets. |
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The parts of the spleen.
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White pulp contains lymphocytes. Red pulp is the blood handling site that disposes of old RBCs.
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Thymus.
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This is most active in early life. It secretes thymopoietin and thymosins. It causes the T cells to become immunocompetent. After puberty it becomes non functional.
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The tonsils.
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1. Palatine tonsils
2. Pharyngeal tonsils 3. Lingual tonsils 4. Tubal tonsils |
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Palatine tonsils.
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Largest tonsils, get infected, removed.
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These tonsils are near the tongue.
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Lingual tonsils.
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Also known as adenoids in the posterior wall of the nasopharynx. Removed if chronically inflammed.
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Pharyngeal tonsils.
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Tubal tonsils.
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These tonsils are found in the auditory tubes.
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