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Lymphoid Organs: Overview (Nursing)

by Jasmine Clark

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    00:01 Our lymphoid organs are grouped into two functional groups as well.

    00:07 We have the primary lymphoid organs, which are going to be areas where our T and our B cells are going to mature.

    00:14 These include the red bone marrow, which is found in our flat bones and in the epiphysis of our long bones, and then the thymus.

    00:26 The T and B cells originate in the bone marrow, however, only B cells are going to mature there.

    00:33 T cells mature in the thymus.

    00:38 The secondary lymphoid organs are going to be areas where our mature lymphocytes are going to first encounter their antigen and become activated.

    00:48 This is going to be in places like the nodes, the spleen, the mucosa-associated lymphoid tissue or MALT, and also in that diffuse lymphoid tissue found throughout the body.

    01:03 So let's take a closer look at each of the lymphoid organs.

    01:07 So of the lymphoid organs, we have the spleen, the lymph nodes, and the thymus.

    01:15 Also, we have the tonsils, the Peyre's patch, and the appendix.

    01:21 It's important to note that while we are calling the tonsils, Peyre's patch; and appendix "organs" they are not actually considered organs and instead are considered lymphoid follicles.

    01:33 Of these, the thymus is going to be a primary lymphoid organ, while the tonsils, spleen, peyre's patch, appendix, and lymph nodes are considered secondary.


    About the Lecture

    The lecture Lymphoid Organs: Overview (Nursing) by Jasmine Clark is from the course Lymphatic System – Physiology (Nursing).


    Author of lecture Lymphoid Organs: Overview (Nursing)

     Jasmine Clark

    Jasmine Clark


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