The body’s immune system plays an absolutely transcendental role in maintaining health and even survival. It allows us to defend ourselves against many external aggressions, among them, attacks from germs such as bacteria, viruses, fungi, parasites, amoebas and other microorganisms, preventing the development of infections and inflammations, sometimes very serious or deadly, and it also fights against toxins and external substances. But that is not its only function, it also takes action to stop the internal deterioration of the organism and prevents the cellular disorder that occurs in all people over the years, every day, new disordered cells appear in our body, chaotic growth, out of control, that the immune system must identify and eliminate, a failure in this surveillance work triggers a set of chaotic cells and finally a cancer or malignant tumor. On the other hand, it is the immune system itself that sometimes becomes erratic in its behavior, and attacks regions of the body itself, mainly glands and joints, triggering chronic diseases that are sometimes difficult to solve. Hence the importance of having a healthy, solid immune system and helping it to maintain its balance. The main defense functions of the immune system are developed through a set of organs, cells, proteins and specific channels. Organs related to the immune system: Spleen, Thymus, Lymph Nodes, Skin, Intestine, Lymph, Blood, Bone Marrow, Tonsils, Mucous membranes. Cells Related to the Immune System: Dendritic cells (are in mucous membranes, first line of defense). B lymphocytes (main responsible for producing antibodies, regulate inflammation). T leukocytes (kill germs and cancer cells). Natural Killers (NK), are specific guardians of maximum defense power. Suppressor cells (regulate immune functions and B and T cells). Thymocytes (produced in the thymus, precursors of T cells). Platelets (produced in bone marrow, fight bleeding, repair wounds). Eosinophils (fight against toxins and in allergy reactions). Macrophages (directly destroy germs). Complement system and cytokines (mainly responsible for inflammation).