Abstract

Introduction and objective: Chronic physical illnesses are directly associated with malfunctions of the immune system. This research aims to study the cells and tissues involved in the immune system.

Materials and methodology: This is a library research which uses valid internet websites in order to access related articles and studies.

Conclusion: There are various cells and tissues involved in the immune system from among which we can refer to B and T cells as well as thymus and lymph nodes in the lymph tissues