| 100% | THALAMUS | 8 | Brain part that regulates sleep and consciousness |
| 63% | THALAMI | 7 | Brain parts that help regulate sleep |
| 43% | LIMBIC | 6 | ___ system, part of the brain that regulates emotion, behavior and long-term memory |
| 41% | PINEALGLAND | 11 | Brain part that produces melatonin |
| 40% | MELATONIN | 9 | Hormone that regulates sleep |
| 36% | RIND | 4 | Part that's cut off and thrown away |
| 36% | NAILS | 5 | Parts that get polished during manicures and pedicures |
| 36% | SKULL | 5 | Skeleton part that protects the brain |
| 36% | EYE | 3 | Body part that blinks and winks |
| 36% | ENGINES | 7 | Car parts that roar and purr |
| 35% | MELATONIN | 9 | Hormone that regulates the sleep-wake cycle |
| 35% | MELATONIN | 9 | Hormone that regulates our sleep-wake cycle |
| 35% | GEAR | 4 | Machine part that rotates and has teeth |
| 35% | LOBES | 5 | Parts of ears and brains |
| 35% | BRAINSTEM | 9 | Body part that connects brain to spinal cord |
| 35% | THROAT | 6 | Body part that includes the pharnyx and larynx |
| 35% | LENS | 4 | Camera part that can zoom in and out |
| 34% | NEURONS | 7 | Parts of the brain that "fire" |
| 34% | EAR | 3 | Body part that has a lobe and a canal |
| 34% | ROTOR | 5 | Turbine part that reads the same forward and backward |
| 34% | EAR | 3 | Body part that contains the hammer, anvil, and stirrup |
| 34% | EYE | 3 | Body part that has an iris and a pupil |
| 34% | ROTOR | 5 | Helicopter part that reads the same forward and backward |
| 34% | EPA | 3 | Org. that regulates arsenic and asbestos |
| 33% | AXLE | 4 | Part that helps the wheels on the bus go round and round |
| 33% | LIP | 3 | Body part that gloss and balm may be applied to |
| 33% | BRAKE | 5 | ___ pads, car part that helps it slow down and stop |
| 33% | HINGES | 6 | Metal parts that enable a door to open and close |
| 33% | MEDULLA | 7 | Part of the brain that controls involuntary functions |
| 33% | THALAMUS | 8 | Part of the brain that relays sensory information |