1. A method of manufacturing an animal tissue model, comprising: providing at least one layer of mesh; placing the at least one layer of mesh into a mold; providing at least two layers of at least a first amount of at least a first polymer material selected from the group consisting of silicone, rubber, silicone-like material, or rubber-like material to form a synthetic skin; adding a crosslinking agent or polymerization agent between the at least two layers of the at least a first polymer material; placing the at least two layers of the at least a first one polymer material into the mold; and permitting the at least two layers of the at least a first polymer material to polymerize in the mold, thereby embedding the at least one layer of mesh within the at least two layers of the at least a first one polymer material at a distance of between 1-2 mm below the surface of the at least a first polymer material to form a first tissue model; wherein strands of the at least one layer of mesh extend beyond the at least two layers of the at least a first polymer material; adding a resin to the strands of the mesh to adhere the strands to each other to form simulated ligaments; and wherein the synthetic skin has stiffness of 185 N/m to 300 N/m.