He is an expert in neurology.

He was studying with his nerves on edge the day before the exam.

I use a heart rate monitor during my daily exercise.

The sympathetic ganglion is a part of our autonomic nervous system and controls various functions of the body.

When the sympathetic nerves are activated, the heart rate increases.

He lost consciousness due to the effects of nerve gas.

The doctor used an electrocardiograph to check the condition of my heart.

Mr. Okuda is an insurance sales representative.

He couldn't bear the wretched living conditions.

You need sandpaper to smooth this wood.