The cricothyroid muscle is an important muscle for adjusting the tension of the vocal cords.

He damaged his vocal cords and temporarily lost his ability to speak.

He is working out his muscles at the gym every day.

Regulating this machine is difficult.

He used the air conditioner remote to regulate the room temperature.

His excitement is always high.

Health is very important.

His opinion is very important.

This circular road smoothens the flow of traffic.

I noticed that my thyroid has gotten a little bigger.