The introduction to lymphatic system has been given. The histology of lymph node with hand drawn illustration has been provided. The characteristic feature of lymph node is presence of subcapsular sinus. The spleen is divided into red pulp and white pulp. The presence of eccentrically placed arteriole in white pulp is characteristic feature of spleen. The architecture of thymus is lobulated and presence of hassall’s corpuscle confirmed the thymus. The palatine tonsil has stratified squamous non keratinized epithelium along with lymphatic follicles. The functions of all the organs are also given. Comparisons of Lymph organs have been shown as tabular form and different clinical terms associated with them are also incorporated. Relevant photomicrographs are given in atlas provided at the beginning of book.