Which muscle? The biceps, at the front of the arm, get shorter, and the triceps, at the back, get longer.
The Biceps brachii muscle. We just call it the biceps, though. (Pronounced bye-seps) To straighten the arm again, the triceps muscle is contracted - which lies 'underneath' the upper arm.
No, the biceps is a muscle in your arm.
Biceps Brachii
The triceps muscle is located on the back of the upper arm and has three heads, while the biceps muscle is located on the front of the upper arm and has two heads. The triceps muscle is responsible for extending the arm, while the biceps muscle is responsible for flexing the arm.
when you bend your arm
When you bend your arm at the elbow and feel your biceps your upper arm muscle contracts.👏👏
biceps brachii muscle.
Biceps brachii muscle, is a muscle located on the inside of the upper arm Biceps femoris muscle, is one of the hamstring muscles at the back of each thigh
The Triceps extend (Stretch out) as the biceps contract.
Probably the Biceps Brachii (commonly called Biceps).
Biceps or triceps