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Lymphoid Cells (Nursing)

by Jasmine Clark

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    00:02 So switching to our lymphoid organs and tissues, we find that these organs and tissues are going to provide a structural basis of the immune system by housing phagocytic cells as well as lymphocytes.

    00:17 We also have several lymphatic structures, including the spleen, thymus, tonsils, lymph nodes, and other lymphoid tissues.

    00:29 The lymphoid cells include two different types of cells.

    00:33 We have the immune system cells, which are found in the lymphoid tissue.

    00:37 And then we have the cells that support them or the supporting cells, which are going to be found in the lymphoid tissue structures.

    00:48 As far as the immune system cells go, there are several different types.

    00:52 We have our lymphocytes, which are the cells of the adaptive immune system that are going to mature into either T cells or B cells, and these are sometimes referred to as T lymphocytes and B lymphocytes.

    01:08 These T cells and B cells are there to protect our bodies against antigen.

    01:14 An examples of antigens are things such as bacteria, toxins, viruses, red blood cells that do not belong in our body, as well as some cancer cells.

    01:28 The T cells are there to manage our immune response and also attack and destroy infected cells.

    01:37 The B cells are going to produce another type of cell called plasma cells.

    01:42 Plasma cells are important because they are going to secrete our antibodies.

    01:47 These antibodies are then going to mark antigens for destruction.

    01:52 After they are marked phagocytic cells are going to go in and phagocytose these cells and get rid of them.

    02:01 Other lymphoid immune cells include macrophages.

    02:05 These are our phagocytic cells that phagocytize foreign substances and help to activate T cells.

    02:13 Another important immune cell in our lymphoid system are the dendritic cells.

    02:19 These have little fingers that capture antigens and deliver them to the lymph nodes.

    02:25 And also play a role in activating our T cells.

    02:30 Outside of the immune system cells, we also have our supporting cells.

    02:34 These include the reticular cells, which are going to produce the reticular fibers that make up the stroma in our lymphoid organs.

    02:44 The stroma more specifically, is a network like support that acts as a scaffolding for these immune cells and gives them a place to go after they've been circulated, or before they are circulated.

    03:00 Here's an example of what those reticular fibers look like, and as you can see, the reticular fibers are surrounding these other immune cells such as macrophages.


    About the Lecture

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


    Author of lecture Lymphoid Cells (Nursing)

     Jasmine Clark

    Jasmine Clark


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