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chapter 15

the lymphatic system and immunity

The composition of lymph most closely resembles? interstitial fluid
What are the functions of the lymphatic system? a)Drain excess of interstitial fluid b)transport dietary lipids c)Carries out immune responses against specific microbes ad abnormal cells
How do lymphatic vessels travel in the skin and in the viscera? Lymphatic vessels travel close to veins in the skin's subcotaneous tissue; in the viscera, they travel close to arteries, forming plexuses (networks) around them.
Where are the lymphatic capillaries located? Lymphatic capillaries are located between cells
What regions/organs do not have those capillaries? avascular tissues, central nervous system, portions of the spleen, red bone marrow
Where does the thoracic duct begin? begins at its lower end as a dilatiom called the cisterna chyli. it receives lymph from the left side of the head, neck and chest the left upper limb and the entire body below the ribs
where does the thoracic duct deliver lymph to? delivers lymph to the junction of the left internal jugular and subclavian veins.
How much does it drain of body lymph? 3/4 of the body lymph
The right lymphatic duct RECEIVE lymph from? the upper right side of the body
the right lymphatic duct DELIVERS lymph to? the junction of the right internal jugular and subclavian vein
What are the primary lymphatic organs? red bone marrow and the thymus
Why are they called the primary lymphatic organs? they are primary lymphatic organs because its the site where steam cells divide and become immunocompetent
What are the secondary lymphoid organs? Are the lymph nodes, spleen and lymphatic nodules. this is the place where most immune responses occur.
What organs filter lymph? Lymph Nodes
What are the primary functions of the spleen? a) site of lymphocyte proliferation b)Immune surveillance and response c)cleanses the blood
What organ funtions strictly in T Lymphocytes maturation? Thymus
Where do palatine and pharyngeal tonsils locate? Palatine tonsils-either side of the posterior end of the oral cavity Pharyngeal tonsil-posterior wall of the nasopharynx
Created by: cassiemc4