30 is understood to be a cavity capable of temporarily storing a blood simulant 28 each reservoir 30 is disposed along the structure of the skin replica 1 so as to communicate with one or more resilient openings 27 reservoirs 30 are formed by placing a silicone patch 32 or the like preferably with flesh tone pigments onto the base layer 4 or backup layer 6 of a skin replica 1 and at least one tube within a supply tube network 29 thereafter the periphery of each patch 32 is bonded to the base layer 4 or backup layer 6 and supply tube network 29 via a silicone resin including optional flesh tone pigments referring now to fig1 the cavity 33 within a reservoir 30 is shown filled with a blood simulant 28 so that the resilient openings 27 are expanded the blood simulant 28 passes through or flows from one or more resilient openings 27 when either the pressure exerted by the blood simulant 28 exceeds a threshold value or an actor or trainee applies a force onto the surface 31 adjacent to a resilient opening 27 to negate the self sealing properties of the skin replica 1 referring now to fig1 a and 15 b a torso simulant 34 with fastener system 20 is shown including a plurality of wounds 35 one or more wounds 35 could include a wound cavity 36 which.