What are medullary cords?
Medullary cord is a portion of the medulla of the lymph node which contains lymphatic tissue and project into the medullary sinus. B cells and plasma cells are the main cell types found in the medullary cords.
What is the histology of the lymph node?
Histological architecture. Lymph nodes are encapsulated by dense connective tissue comprised of elastin and collagen fibres along with interspersed fibroblasts. The convexed surface of the lymph node is pierced by numerous afferent lymph vessels.
What type of cells would you expect to find in the Paracortex?
The middle layer (Paracortex) is mostly populated by T cells and dendritic cells (Figure 1). The paracortex also contains specialised blood vessels (high endothelial venules) through which many B and T cells enter the node.
What are Trabeculae in a lymph node?
The nodes are covered by a capsule of dense connective tissue, and have capsular extensions, of connective tissue, called the trabeculae, which provide support for blood vessels entering into the nodes.
What is the function of medullary cords?
The medullary cord is a dense structure in the lymph node, and it is composed of lymphatic tissue. These cords are found within the lymph node’s medulla, which is located in the center of the node. They function by producing antibodies that flow out of the lymph node via the lymph fluid.
What are medullary cords made of?
The medullary cords are cords of lymphatic tissue, and include plasma cells, macrophages, and B cells.
What cell types are found in medullary cords?
The medullary cords contain antibody-secreting plasma cells, B-cells, and macrophages. The medullary sinuses (or sinusoids) are vessel-like spaces that separate the medullary cords.
What is appearance of lymph?
Normal lymph nodes appear sonographically as somewhat flattened hypoechogenic structures. These fatty deposits, beginning in the center of the lymph node and progressing toward the periphery, are easily recognized as highly reflective defects in the hypoechogenic lymphoid tissue.
Where are medullary cords located?
The medullary cords are part of the lymphoid system, which helps the body fight infections. The medullary cord is a dense structure in the lymph node, and it is composed of lymphatic tissue. These cords are found within the lymph node’s medulla, which is located in the center of the node.
Which cell type is found in the medulla of the lymph node?
The medulla contains plasma cells, macrophages, and B cells, as well as sinuses, which are vessel-like spaces that the lymph flows into, and nodules located within the sinuses. Lymph nodes contain a hilum beneath the capsule, which brings blood supply to the tissues of the lymph node.
Which of the following is composed of Epithelioreticular cells?
Which of the following is composed of epithelioreticular cells? Bone marrow, lymph nodes, the spleen and the thymus are all part of the lymphatic system. Most lymphatic organs are made of a framework of reticular fibers and reticular cells. However, the thymus is made of epithelioreticular cells instead.