| Answer | Crossword Clue |
|---|---|
| IRIS | It regulates the size of the pupil |
| IRIS | Diaphragm that controls the size of the pupil |
| GLUCOSE | Insulin regulates the amount of it in the blood |
| pendulum | A weight hung from a fixed point so that it can swing freely backward and forward, esp. a rod with a weight at the end that regulates the mechanism of a clock |
| pendulums | A weight hung from a fixed point so that it can swing freely backward and forward, esp. a rod with a weight at the end that regulates the mechanism of a clock |
