The lymphatic system is an important part of the immune system and is a network of tissues and organs that help rid the body of toxins, waste and other unwanted material. The functions of the lymphatic system are fluid balance, fat absorption, and defense. The encapsulated lymphatic organs are the lymph nodes, thymus, and spleen. The mucosa-associated lymphoid tissue (MALT) consists of a vast network of nonencapsulated lymphatic tissue found in and beneath the mucous membranes lining the digestive (gut-associated lymphoid tissue – GALT), respiratory (bronchial/tracheal-associated lymphoid tissue (BALT), urinary, and reproductive tracts. The MALT intercepts microorganisms as they enter the body. The intestine represents the largest mass of lymphoid tissue in the body and 60-70% of the body’s immune system exists in the GALT.
Red bone marrow makes red blood cells and leukocytes, which are white blood cells that are part of the immune system. Two types of lymphocytes exist, B-cells and T-cells. Pre-B and pre-T cells originate from stem cells in red bone marrow. The pre-B cells remain in the red bone marrow and become B cells. The pre-T cells circulate to the thymus where they become T cells. Both B and T cells circulate to other lymphatic tissues, such as lymph nodes, where they can divide and increase in number in …show more content…
Immunological memory is made after an initial response to a new pathogen (organism or virus that can cause disease or illness), leading to an enhanced response to future exposure to that same pathogen. Self antigens are antigens present on SELF tissue that would normally not provoke an immune response unless in a diseased state. In AD, the immune system fails to differentiate between self-antigens and foreign antigens and an immune response is produced when the body attacks its self antigens with antibodies made against it, resulting in tissue
Red bone marrow makes red blood cells and leukocytes, which are white blood cells that are part of the immune system. Two types of lymphocytes exist, B-cells and T-cells. Pre-B and pre-T cells originate from stem cells in red bone marrow. The pre-B cells remain in the red bone marrow and become B cells. The pre-T cells circulate to the thymus where they become T cells. Both B and T cells circulate to other lymphatic tissues, such as lymph nodes, where they can divide and increase in number in …show more content…
Immunological memory is made after an initial response to a new pathogen (organism or virus that can cause disease or illness), leading to an enhanced response to future exposure to that same pathogen. Self antigens are antigens present on SELF tissue that would normally not provoke an immune response unless in a diseased state. In AD, the immune system fails to differentiate between self-antigens and foreign antigens and an immune response is produced when the body attacks its self antigens with antibodies made against it, resulting in tissue