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56 Cards in this Set
- Front
- Back
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What are the 3 parts of the Lymphatic System?
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Lymphatic vessels(lymphatics)
Lymph Lymph nodes |
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What does the lymphatic system do?
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Returns interstitial fluid and leaked plasma proteins back to the blood.
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What is interstitial fluid called in lymphatics?
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Lypmh
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Does lymph slow things down or speed things up in the circulatory system?
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Slow things down.
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Lypmhatic vessels are a 1 way system, all flowing towards what?
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The heart.
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What is the difference between Lymphatic Capillaries compared to blood capillaries?
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very permeable.
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Lymph Capillaries are made of?
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Endothelial cells.
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Endothelial cells overlap each other to create what in the Lymph Capillaries?
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One-way valves
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Where are lymphatic capillaries NOT found? Give examples
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bones, teeth, bone marrow, CNS
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What are Lacteals?
What do they do? |
specialized lymph capillaries in intestinal mucosa.
Absorb digested fat and deliver fatty lymph(chyle) to blood |
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What is the difference between Lymphatic Collecting Vessels and Veins?
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Thinner walls - more internal valves
Anastomose more frequently(nodes) |
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Deep Lymph Vessels travel with what in the body?
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Arteries
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Collecting vessels in your skin travel with what in the body?
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Superficial veins
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Vasa vasorum means what?
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Vessel of vessels.
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What are the main 5 Lymphatic Trunks?
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Paired lumbar
Paired bronchomediastinal Paired subclavian Paired jugular trunks Single intestinal trunk |
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Where does the Right lymphatic duct drain?
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Right upper arm, and ride side of head and thorax.
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What does the Thoracic duct drain?
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The rest of the body that the Right Lymphatic duct does not.
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What is Lymph propelled by? transported?
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Pulsations of nearby arteries.
Contractions of smooth muscle in walls of lyphatics. |
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What are the main Lymph cells? The warriors.
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Lymphocytes
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What do T-Cell Lymphocytes do?
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Manage immune response
Attack and destroy foreign cells |
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What do B-cell lymphocytes do?
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Produce plasma cells that secrete antibodies
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What do Macrophages do?
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phagocytize foreign substances - help activate T cells
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What do Dendritic cells do?
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capture antigens - deliver them to lymph nodes
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What do reticular cells do?
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Produce stroma that supports other cells in lymphoid organs?
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Which cells signal the T-cell lymphocytes to help fight an invasion?
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Macrophages
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What are the two types of Lymphoid tissue?
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Diffuse lymphatic tissue
Lymphatic follicles |
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Describe Diffuse Lymphatic tissue.
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reticular tissue elements in every body organ
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Where are the largest collections of diffuse lymphatic tissue?
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Lamina Propria of mucous membranes and lymphoid organs
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Which lympoid tissue is solid, spherical, and tightly packed of reticular elements and cells?
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Lymphatic follicles, or nodules
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Which lymphatic cells swell when you have an infection?
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B cells
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What are the principal lymphoid organs?
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Lymph nodes
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Where are lymph nodes clustered in your body? General, and a few examples.
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Connective tissue, near body surface in inguinal, axillary, and cervical regions.
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What are the two functions of the Lymph Nodes?
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Filter Lymph
Immune system - activate it. |
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What is the structure of Lymph Nodes?
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External fibrous capsule
Trabeculae(small beams) 2 distinct regions: Cortex Medulla |
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What do sinuses contain? lymphatic system wise?
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Macrophages
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What is the pathway through a lymph node?
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1. Enter afferent lymphatic vessels
2. Travel thru large subscapular sinus and into the smaller sinuses 3. Exits node at hilus via efferent vessels |
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What is the bonus of having fewer efferent vessels in Lymph nodes?
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to allow lymphocytes and macrophages time to carry out functions, by slowing down the flow.
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What is the largest lymphoid organ in the body?
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Spleen
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What 2 functions does the spleen perform?
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1. Lymphocyte proliferation and immune surveillance and response
2. Cleanses blood of aged cells and platelets and debris |
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Which organ stores byproducts of RBC destruction for later uses?
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Spleen
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What does the spleen do in fetal bodies?
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Erythrocyte production
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What 4 things does the spleen store?
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Platelets, lymphocytes, macrophages, erythrocytes.
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What two distinct ares does the spleen have?
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White pulp
Red pulp |
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What is the Red pulp rich in? Spleen wise.
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macrophages for disposal of old RBCs and bloodborne pathogens
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What is the White pulp rich in?
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Lymphocytes
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When is the Thymus most active?
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During childhood.
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What does the Thymus do?
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T lymphocyte maturation
(gives the ammo to the rest of the system) |
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What is special about thymocytes?
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Star-shaped epithelial cells that provide an environment where the T lymphocytes become immunocompetent
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What are the most simple lymphoid organ?
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The tonsils
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What are the four different types of tonsils?
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Palatine
Lingual Pharyngeal Tubal Tonsils |
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What do tonsils do?
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The crypts trap and destroy bacteria and particulate matter.
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What is a Peyer's patch?
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A cluster of lymphoid follicles in the wall of the small intestine that destroy bacteria.
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What structure generates memory lymphocytes?
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Peyer's Patches
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What does MALT stand for?
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Mucosa
Associated Lymphatic Tissue |
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What are some examples of MALT?
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Peyer's Patch
Tonsils Appendix |
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What does MALT do?
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Protects digestive and respiratory systems and foreign matter.
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