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Are Macrophages and Dendritic cell the same?
Both macrophages and dendritic cells are formed from the same precursor cell, the monocytes. However, the two cells serve different functions during an infection. Macrophages remain in the area of the infection and phagocytosis (engulf) foreign invaders and dead cells. Dendritic cells leave the infected tissue and travel to local lymph tissue in order to alert the adaptive immune system.
Where in the lymph node do the T cells first encounter antigens presented by dendritic cells?
deep in the cortex.
What is the name of the inner region of a lymph node?
The Medulla is the inner region of a lymph node. It contains B cells, plasma cells, and macrophages.
What are the roles of the thymus and the lymph nodes in immunity?
The thymus contains large numbers of T cells and scattered dendritic cells, epithelial cells and macrophages. Immature T cells migrate from red bone marrow to the thymus, where they multiple and begin to mature. Lymph nodes filter lymph, which enters a node through one of several afferent lymphatic vessels. As lymph flows through the node, foreign substances are trapped by reticular fibers within the spaces between cells. Macrophages destroy some foreign substances by phagocytosis and lymphocytes destroy other by a variety of immune responses. Plasma cells and T cells that have divided many times within a lymph node can also leave the node and circulate to other parts of the body.
Three types of phagocytic cells in the lymph node?
1. Neutrophil 2. Macrophage 3. Dendritic
What lymphocyte is the main signaling cell in adaptive immunity?
Dendritic cells. They will take in pathogens and present them on MHC's (class 1 or class 2) depending on the nature of the pathogen. Dendritic cells will travel to your secondary lymph system (lymph nodes) for the pathogen to be identified and appropriately responded to.
What are the lymph nodes made out of?
lymph nodes are made out of lymphoid tissuethat is able to receive the lymph and return cleaned lymph back into the circulation. Generally the cell types found in the lymph nodes are antigen-presenting cells (specifically dendritic cells), T cells (both helper CD4 T cells and killer CD8 T cells) and B cells (which produce antibodies).
Which kind of cells mostly found in lymph?
White blood cells, specifically lymphocytes, are the most commonly found cells in the lymph. These cells are an essential part of the immune system and play a vital role in recognizing and fighting infections in the body.
What Cells in a lymph node that engulf and destroy damaged cells foreign substances and cellular debris?
Macrophages are the cells in a lymph node that engulf and destroy damaged cells, foreign substances, and cellular debris. They play a crucial role in the immune response by clearing out these harmful elements and helping to protect the body against infections.
What is the function of langerhan's cells?
Langerhans cells are a subset of dendritic cells that reside in the epidermis (Part of the immune system). They have long dendrites (like arms) that capture antigen in the skin, and when they find an antigen, they migrate to lymph nodes and present to T cells allowing the adaptive immune system to respond.
Internal portion of a lymph gland where cells are arranged in a cordlike fashion?
The medulla is the internal portion of a lymph node where cells are arranged in cordlike fashion. It contains B-lymphocytes, plasma cells, and macrophages, contributing to the immune response by filtering lymph and trapping foreign particles. It plays a crucial role in the immune system's function by helping to identify and eliminate pathogens.
What is the role of macrophages in stimulating B lymphocytes?
some B lymphocytes are taken by macrophages to lymph nodes during the invasion the pathogen. The macrophages the exposes the pathogen's antigens to the B cells in the lymph nodes,The B cells with the matching receptor of the specific antigens respond by dividing repeatedly by mitosis, producing huge numbers over a few weeks.
