One set of muscles raises the ribs in inspiration, another set lowers them in expiration; one group flexes the fingers and clenches the fist, an opposed set extends the fingers and opens the hand.
Contraction of the bicepsflexes the forearm at the elbow; the contrary movement, extending the forearm, results from the contraction of the triceps.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "flexes" in a variety of sentences. We hope that you will now be able to make sentences using this word.
