Question

Name the primary and secondary lymphoid organs.

Answer 1

Hint: The circulation between the blood and lymphoid organs in the immune system by the immune cells. And lymph is obtained due to the lymphatic organs and the circulating clear fluid from the lymphatic system. The lymphoid organs were first introduced by Olaus Rudbeck and Thomas Bartholin in the 17th century. Thymus, Bone marrow, lymph nodes, and spleen are the part of lymphoid organs.

Complete answer:
There are two types of lymphoid organs such as primary organs in which maturation of lymphocytes into the immune components and on the secondary lymphoid organs provides the area where immune components cells react with each other. Thymus is the primary lymphoid organ in which the T lymphocytes mature and bilobed encapsulated organs at the superior mediastinum.
Lymph nodes are small enclosed oval structures present with the lymph vessels and serve as filters for the removal of bacteria in the organs. There are two types of lymphoid nodules in which primary lymphoid nodules are present in the peripheral location and provide dense accumulation of the small lymphocytes known as the name mantle and corona. On the second type lymphoid nodule located at the spherical aggregates of the B lymphocytes. And between the medulla and Cortex Paracortex of lymph nodes present at the thymus dependent zone and house of the T cells.

Note: The fluid present in the lymphatic system consists of fluid called lymph vessels that help to transfer the lymph and number of organs and structures that contain the lymphatic tissues and red bone marrow. With the help of lymphatic fluid flow from the interstitial space into the blood.