��brain, eye, eyelid, pupil, iris, cornea, lens, tear duct, nose, nostril, nasal cavity, sinus, tongue, throat, esophagus, trachea, bronchi, lung, ribcage, sternum, vertebrae, spinal cord, muscles, flesh, bone, skullcap, gears, cogs, pulleys, hydraulic system, fuel tank, engine block, exhaust pipe, turbine blades, air ducts, control panel