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CHAPTER 9  ■  Leukocytes: Lymphocytes and Plasma Cells                                   189




                   T lymphocytes, B lymphocytes, and plasma cell                                                                 Differentiate the characteristics between short-lived and long-lived

                   kinetics                                                                                                        plasma cells.


                     Describe  the  activation  and  function  of  T  cells,  B  cells,  and                                   ■   Describe the appearance and cytoplasmic contents of Russell’s bod-

                       plasma.                                                                                                     ies, Mott cells, and   ame cells.




                   Plasma cell development and maturation                                                                         NOTE:


                   ■   Describe the pathway of plasma cell development.                                                           ■   Indicates MLT and MLS core content

                   ■   Identify the maturational characteristics of plasma cells.                                                   Indicates MLT (optional) and MLS advanced content











                                                                                                                                                    k      .  T                     q             m   -
                   ANA  OMICAL ORIGIN AND

                   DEVELOPMEN   OF LYMPHOCY  ES                                                                                                                  m    immunocompetent (                   -
                                                                                                                                                 mm                    )       m              . I


                   I                                                                        , m              ,                                       m                                              q

                         m                   (                 C            ), lymphocytes                                        m     . I         m           m bursa              B    m

                   plasma cells                                                                                                                     m  . M                                                   m

                                                                   antigens                                                                                        ;             m                        m

                   antibodies.                                                                                                                                  .


                                                                                                                               Secondary Lym phoid Tissue
                   Sites of Lymphocytic Development
                                                                                                                               T                        m                                             m

                   D            m                            m     ,     m                             m                       (F   .   .  ),           ,        P       ’                                       (
                                                                                       k                        .


                   L                                   m                                                         ,
                                  m                 m                                       m          -


                           m        . C                                          m
                                        interleukin-1 (IL-1)        IL-


                            m              m       . C                                         m                                       Palatine tonsil
                            m                                                                                                                                                                     Adenoids


                                              m                  m      . H  m                                                          Lingual tonsil
                                               m                                                                                                                                                             Thymus


                                               -B                      m         . T    m  j
                                                          T lymphocytes     B lymphocytes                                             Nodes                                                                  gland


                   (                  .  ). A       m                                              B       .



                   Prim ary Lym phoid Tissue

                   I       m     ,                        m                      thymus             -                                                                                                         Spleen


                                    m                         m                    (F   .   .  )
                                         m                . S   m                m


                        m






                                                Approximate Percentage of T and B
                       TABLE         9.1
                                                Lymphocytes in Lymphoid Organs



                       Lymphoid                     T Lymphocytes                      B Lymphocytes

                       Organ                        (%)                                (%)

                                                                                                                                       Appendix                                                               Peyer patches
                       Thymus                                   100                                  0                                                                                                        (in intestine)


                       Blood                                  80–85                              10-15

                       Lymph nodes                                60                               40


                       Spleen                                     45                               55
                                                                                                                               FIGURE  9.1  L                    m                  . (R                          -
                       Bone marrow                                10                               90                          m             m C         BJ,            JJ. Memmler’s T e Human Body


                       Modi  ed from Claman HN. J Am Med Assoc. 1992;268(20):2792.                                             in Health and Disease,             , B     m     , MD: W         K
                                                                                                                               H        ,         .)
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