The epicranius muscle is one of the important muscles for making facial expressions.

He is doing a special exercise to train his longissimus thoracis muscle.

The longissimus cervicis muscle is a part of the neck muscles, helping to pull the head back.

He trains his biceps at the gym every day.

He measured muscle activity using an electromyograph.

I examined muscle activity using an electromyogram.

The stapedius muscle is the smallest muscle located in the human middle ear.

He does piriformis muscle stretches every day.

This number is called Fuka-soku Fuka-soku-ten, and it's almost impossible to comprehend its magnitude.

Understanding the concept of 'Ha-line conversion sounds' is important in learning Japanese.