robos body designed is a combination internal external skeletal structure there are 4 reasons for this design. 1 and this is the big one, robos body was built using parts found in a junkyard (do to there cheapness and inability to be traced) 2. because a simple human based internal skeleton would prevent robo from being able to perform many of the tasks he is now able to. 3. it adds to his overall mobility, flexibility, damage resistances and speed. and 4 because it makes him that much more interesting and easy to draw than his brothers.
examle 1. shows the arm meting with the chested. the shoulder, biceps, and triceps are soft hydrolock cylinders (e.x.2.) called synth muscles and are lade out just like real muscles. the shoulder muscles are mounted to the rotater cuff, (do to this being a weak area in the design) and are hidden by the series if plates as shown.
#2 show a sinth muscle witch is a thick triple layered plastics bag covered in a tightly woven wier mesh, when hydrolocks are pushed into the bag, the bag expanse casing the two ends two contract just like a muscle, the wire mesh absorbed the fores placid on the plastic bag allowing it to experiences grater pressers.
#4 is a side view of robos arm
#5 is a head view of robos forarm