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 [...]
Everything you need to know about immunology. Some of the frequently asked questions are as follows:- Q.1. What is immunology? Ans. Study of a host's specific defense to a pathogen or a foreign substance is called immunology. Q.2. What is an antigen? Ans. A substance which on entering a body causes formation of antibodies and reacts only with a specific [...]
In this article we will discuss about the functions of alimentary tract, explained with the help of suitable diagrams. In most of the cases of foodborne illness we consider, the pathogenic (disease producing) effect occurs in the alimentary tract giving rise to symptoms such as diarrhoea and vomiting. Since these are essentially a dysfunction of the gut, a useful starting [...]