click below
click below
Normal Size Small Size show me how
chapter 15
the lymphatic system and immunity
Question | Answer |
---|---|
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 |