Chapter 16

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Author:
maryanneee67
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31453
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Chapter 16
Updated:
2010-08-27 04:09:12
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lymphatic system lymphoid tissue
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Lymphatic system
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  1. Lymphatic system consist of
    • lymp
    • lymphatic vessels
    • lymphatic tissue
    • lymphoid organs
  2. Pas Lymph?
    Bone marrow, teeth, CNS
  3. Functions of the lymphatic system
    • Fluid balance
    • Protection
    • Intestinal absorption of fats and fatsoluble vitamins
  4. Lymph
    • When interstatial fluid enters lymphatic vessels
    • clear fluid formed from plasma during capillary exchange

    water, electrolytes, waste from metabolizing cells, protein
  5. Where does lymp return to?
    veinssssss
  6. Lymphatic circulation
    • One way system
    • begins in tissues
    • ends in blood stream
  7. Lymphatic capillaries
    More permeable than blood caillaries.
  8. lacteals
    specialized lymphatic caillary that absorbs digested fats
  9. Lymphatic vessels
    drain through ymph nodes that filter the lymp. carry lymph away from the nodes. drains into right lymphatic duct or thoracic duct and empties into bloodstream near <3
  10. Right lymphatic duct
    • Short vessel
    • Receive lymph from superior right quadrant
    • empties into right subclavian vein
    • (2 valves)
  11. Thoracic duct (left lymphatic ducts)
    • Larger vessel
    • receives lymp from all part of body except those superior to the diaphragm on the right side
    • Empties into left subclavian vein
    • Two valves
  12. Cisterna chyli
    the ducts first part is enlarged
  13. Chyle
    • milky fluid that drains from the intestinal lacteals
    • Lymph + fat globules = chyle
  14. Movement of lymph
    • valves
    • Segments of vessels located between valves contract thythmicallyl
    • skeletal muscles compress vessels and drive lymp
    • breathing
  15. Lymphoid organs*
    • Lymph nodes
    • Tonsils
    • Thymus gland
    • Spleen
  16. lymph nodes
    • small rounded masses of lymphatic tissue
    • -filters lymph as it flows through the lymphatic system
  17. Cervical nodes
    located in the neck and drain and cleanse lymph from the head and neck areas
  18. axillary nodes
    • in the pits
    • drain and cleanse lymph from upper extremities, shoulders, breast area
  19. tracheobronchial nodes
    near trachea and larger bronchial tubes
  20. mesenteric nodes
    abdominal cavity (100-150 of these nodes)
  21. Inguinal nodes
    • In the groin
    • drain and cleanse lymph from the lower extremities and external genitalia
  22. hilum
    intended area, exit point for efferent lymphatics
  23. sinuses
    lymph filled spaces
  24. Tonsils
    • Partially encapsulated lymphoid tissue
    • remove contaminants and trap pathogens
  25. palatine tonsils
    • opening of oral cavity into pharynx
    • oval bodies located at each side of the soft palate
  26. Pharyngeal tonsides (adenoids)
    Opening of nasal cavity in upper pharynx
  27. lingual tonsils
    back of the tongue
  28. spleen
    • largest lymphoid organ
    • cleanses blood
    • destroys old and worn out RBC
    • produces RBC before birth
    • Resevoir for blood
    • Flattened organ
    • Left hypochondriac region sur the diaphragm portected by rids
  29. Thymus
    • key role in immune system development
    • produces thymosin
    • develops T cells
    • Promotes lymphocyte growth
    • Promotes lymphoid tissue
    • Located in the mediastinum of the thoracic cavity
    • shrinks after pubery and is replaced by CT
  30. Other lymphoid tissue
    • Appendix attached to the first part of the large intestine
    • Mucosal assoiated lymphoid tissue (MALT)
    • gut associated lymphoid tissue (GALT)
    • -ex: peyer patches
  31. Reticuloendothelial system
    Responsible for destroying worn out blood cells backeria cancer cells and other harmful substances
  32. Kupffer cells
    in liver
  33. Dust cells
    In lungs

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