smooth muscles

a handle resting on a fulcrum or pivot, used to move heavy objects

they join with the bones and are responsible for the bones' movements. they contract voluntary and are fast and non-persistent, which means they get tired

agonists

they generally cover and protect the organs

a motor neuron sends the order to the muscle and the muscle cells produce the necessary energy

striated muscles

move and maintain the posture of the body, help internal organs perform movements

Striated muscle fibre, smooth muscle, cardiac muscle

long or fusiform, flat, circular or sphincters

they close or open a cavity or tube, they can be found in the mouth and lips

biceps and triceps

cardiac muscles