Immune System- As I understood

Human Immune System:1.Cellular immunity rooted in cells.
2.Humoral immunity by chemical factors circulating in blood & tissues.
Antigens (short for antibody generators) and are defined as substances that bind to specific immune receptors and elicit an immune response.
Granulocytes-belong to Phagocytes which act on the invadors at the site to stop infection.

Macrophages releases Cytokines. A Cytokine is tumor necrosis factor which destroys cancer cells & tumors.

Lymphocytes
A lymphocyte is a type of white blood cell (leukocytes) in the vertebrate immune system.
Lymphocytes are responsible for immune responses. There are two main types of lymphocytes: B cells and T cells.
* B lymphocytes (often simply called B cells) produced by bone marrow and mature there.
* T lymphocytes (likewise called T cells).precursors of T cells leave the bone marrow and mature in the thymus
Large granular lymphocytes are more commonly known as the natural killer cells (NK cells). The small lymphocytes are the T cells and B cells
Most of the T cells in the body belong to one of two subsets. CD4 & CD8 immune cells which activate other immune factors to work against the disease.
Plant & animal aminoacids-complement which triggers chemical factors to encounter the foreign invaders.
CD8+ T cells are cytotoxic T lymphocytes (CTLs)which secrete molecules that destroy the cell to which they have bound.

Effects of few Cytokines & Interleukins (1-18):

IL-1 Causes maturity of immune cells to fight pathogens & cancer.
IL-1 & Interferon causes sleep when we lie.
IL-1,Interferon+tumor necrosis factor- combine to control zinc metabolism& withhold minerals in tissues to strengthen immune response against infections,tumors & virus.
IL-2 Stimulates T cells to proliferate & increases immunity/tumor necrosis.
IL-2,IL-4,IL-6 & Interferon -incites killer cells to attack specific target or antigen or cancer cells

B Cells and Antibodies
Antibodies are only produced by B lymphocytes.Antibodies bind antigen to produce immunoglobulins (igA,igD,E,G &M)which provide immediate short-term protection against disease for individuals who are at high risk of experiencing severe disease or of developing serious complications from the disease.

Boosters of Immune System:

Antioxidents, Vitamin C,E,A,B6,Betacrotin & Selenium. Fibre for digestion.HDL