Essay on Lymphoid Organs | Lymphatic System | Humans | Biology
In this essay we will discuss about the primary and secondary lymphoid organs. Essay # 1. Primary Lymphoid Organs: These are those lymphoid organs where immature lymphocytes differentiate to antigen-sensitive lymphocytes e.g: 1. Bone Marrow: It is highly vascular fatty tissue present in the cavities of the long bones and is of two types: Red bone marrow in the epiphyses [...]