上じょう腕わん筋きん

noun

brachialis muscle

Anatomical term for the muscle in the upper arm that flexes the elbow.

• 上じょう腕わん筋きんは肘ひじを曲まげるときに働はたらく筋きん肉にくです。

  The brachialis muscle is the muscle that works when you bend your elbow.