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Chapter 21a
| Question | Answer |
|---|---|
| Lymphoid stem cells group 1 (3) | - remain in bone marrow - develop with help of stromal cells - produce B cells and natural killer cells |
| Lymphoid stem cells group 2 (2) | - migrates to thymus - produces T cells in environment isolated by blood-thymus barrier |
| Lymphoid tissues | Connective tissues dominated by lymphocytes |
| Lymphoid tissues structure compoents (2) | - Diffuse - Nodules |
| Diffuse | blends with surrounding connective tissue |
| Nodules (2) | - Areolar tissue with densely packed lymphocytes - Germinal center contains dividing lymphocytes |
| Mucosa-Associated Lymphoid tissue (MALT) (4) | - Mucosa of digestive, respiratory, reproductive, urinary system - Tonsils - Payer's patches - Aggregated lymphatic nodules |
| Appendix (Vermiform Appendix) | contains a mass of fused lymphoid nodules |
| Lymphoid organs (3) | - lymph nodes - thymus - spleen |
| Structures of body defenses are seperated from surrounding tissues by a | fibrous connective tissue capsule |