Yes your tricep and bicep both work together to help bend your arm.
when you bend your arm
Triceps does not help to bend your arm. It helps to straighten your upper limb across the elbow.
You bend it backwards. Or bend it behind your back.
No you can not.
at the elbow. "Flexion of the arm" just means to bend it.
your elbow
you spine
When you bend your arm at the elbow, your hand will move towards your shoulder.
pds
The muscles in your arm never expand; so when you bend your arm, your biceps contract as your triceps return to their regular form. When you extend your arm, you triceps contract as your biceps return to their regular form.
You fell on a stone when you were still very young and your muscles between the upper and the lower arm are packed together or shringed which makes the arm not to bend fully what remedy can be done?