involuntary muscle

countable uncountable

(anatomy) Muscle that is not controlled by individual volition; cardiac muscle and smooth muscle.

Japanese Meaning

個々の意思で制御できない筋肉。心筋や平滑筋が含まれる。

The doctor explained that the heart is essentially an involuntary muscle that continues to beat without conscious thought.

医師は、心臓は本質的に不随意筋であり、意識的な思考なしに鼓動し続けると説明した。

Sense（1）

(anatomy) Muscle that is not controlled by individual volition; cardiac muscle and smooth muscle.

involuntary muscles

（ plural ）