BIOL-242 Lecture Notes - Lecture 19: Reticular Connective Tissue, Loose Connective Tissue, Germinal Center
15 May 2020
School
Department
Course
Professor
Document Summary
Chapter 20 part 2 | lymphoid organs and tissues. Houses, and provides proliferation side for lymphocytes. Surveillance vantage point for lymphocytes and macrophages. Largely reticular connective tissue - type of loose connective tissue. Lymphoid follicles (nodules) are solid, spherical bodies of tightly packed lymphoid cells and reticular fibers. Can easy proliferate then scavenge for microorganisms, and scavenge by floating through the lymph, then thru the lymph they pass thru the heart then get ejected again. May form part of larger lymphoid organs. Isolated aggregations of peyer"s patches and in appendix. Embedded in connective tissue, in clusters along lymphatic vessels. Near body surface in inguinal (near privates), axillary (armpit), and cervical (neck) regions of body. Filter lymph // macrophages contained in lymph destroy microorganisms and. Immune system activation // lymphocytes activated and mount attack against antigens. Vary in shape and size but most bean shaped. Trabeculae extend inward and divide node into compartments.
