The systemic inflammatory response syndrome (SRIS) seems to be due to the activation of the toll-like receptors, specific of the inflammatory response cells, through concrete cytosolic signals which lead to a cascade of reactions acting cytokins, growing factors and others inflammatory mediators. This kind of work revewes and discusses several classifications of animals models to study the SRIS, and propose to divide these models according to concrete goals, which can be the following ones: (1) To study innate and adaptative receptors of regulatory gens in the SRIS. (2) To study signals receptors (cytokines and growing factors). (3) To study the answer to signals. (4) To study treatments through specifics antinflammatory blockage. (5) Specific models of sepsis. (6) Others inducing models of SRIS. (7) Others therapeutical models. -Antinflammatories. -Antiacoagulans: Coagulations inhibition in human assays. Phase II Anticoagulans: Antitrombine III, PCA and TFPI. -Antibiotics. -Replacing Volume Treatments. -Surgical Treatments. As to the animals models to study Parenteral Nutrition, we could make the next classifications and sum it up: (1) Animal models to study the parenteral via of administration. (2) Models to study viability, absorption and local tolerance of the administration via. (3) Study models for complications. (4) Animal models to study pharmacodynamic, metabolization and to investigate the tolerance of new molecules or substrates.