extensor
A flexor is a muscle that causes a joint to bend. In contrast, an extension is a muscle that straightens a joint.
A muscle that straightens a limb at a joint is called an extensor. Extensors work by contracting to increase the angle between the bones at a joint, allowing for movement such as straightening the elbow or knee. In contrast, muscles that bend a limb at a joint are known as flexors. Together, these muscle groups enable a wide range of motion in the body's joints.
To extend a muscle A MOTION IS MADE TO INCREASE AN ANGLE BETWEEN TWO BONES.
extends leg; straightens knee joint
An extensor straightens part of your body.
They're referring to opposite motions, if a muscle bends a joint - it's antagonist straightens it out.
A muscle that straightens a joint is called an extensor.Extensors are the muscles whose contraction extends or straightens a limb or other part of the body.Extensor muscle
a big one
Extender
Extensor
Flexor
Flexor