31 Distinguish between primary and secondary lymphatic organs Give examples of

31 distinguish between primary and secondary

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3.1 Distinguish between primary and secondary lymphatic organs. Give examples of each. (8) 3.2 What cell types are especially abundant in the lymphatic organs, where are they formed and where do each of them mature? (5) 3.3 Make an annotated drawing of a lymph node indicate the parts with their functions. (5) 3.4 Complete a replica of the following table to indicate the places where each of the following are found in the human body and their main functions. (10)
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Study unit 6 99 Peyer’s patches Thymus Spleen Tonsils Lymph nodes Location(s) Functions 4. Diseases that relate to the lymphatic system. 4.1 The disease elephantiasis affects the lymph vessels. What causes it and how does it affect the lymph vessels? (3) 4.2 What is “oedema” and what causes it? (2) 4.3 What role does lymph vessels play in the spread of cancer? (2) 4.4 What causes lymphatic nodes to swell? (4) Individual exercise Now monitor whether you have mastered this system. 1. Which terms in column B (A to E) correspond best to the descriptions in column A (1.1 to 1.6)? Only write down the LETTER next to the particular number. (6) Column A Column B 1 The largest lymphatic organ and also a blood reservoir A Lymphatic nodes 2 Filters lymph B Peyer’s patches 3 Large in young children; produces hormones that are important in the immune system C Spleen 4 Together known as MALT D Thymus 5 Removes dead erythrocytes E Tonsils 6 Prevents bacteria from penetrating the intestinal wall
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Study unit 6 100 2. The figure 6.14 illustrates a lymphatic node as seen in a longitudinal section. Questions 2.1 to 2.3 relate to this. FIGURE 6.14: A LYMPH NODE AND VESSELS 2.1 Name the sections indicated by numbers 1 to 6. (6) 2.2 Why is it necessary that there should be less of structure 5 present in a lymphatic node than of structure 1? (2) 2.3 What is the function of X when the sections increase in size? (1) Control your answers using the listed sources. Report any problems that you experience at the contact sessions.
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Study unit 7 101 7 THE IMMUNE SYSTEM Approximate study time needed to complete this study unit Total Time: Approximately 12 hours Contact sessions: 3 Self study: 9 hours Study unit outcomes On completion of this study unit you should be able to explain what is meant with the term “non - specific immune response”, name the different ways in which it operates and critically evaluate the importance thereof; explain how blood clotting and wound healing are involved in maintaining barriers to entry; explain what is meant with the term “specific immune response”, name the different ways in which it operates and critically evaluate the importance thereof; distinguish between an antigen, a self-antigen and a foreign antigen; define an antibody, draw it and explain its functions; list the different cell types involved in the specific immune response and briefly describe the function of each; describe B-cell and antibody-mediated immunity (humeral response); describe T-cell and cell-mediated immunity (cellular response); draw a comparison between B and T-cells;
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Study unit 7 102
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  • Spring '16
  • Ambani Mudau
  • Phylum, Windelspecht

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