Cardiac
Isometric contraction
The heartbeat is caused by the contraction and relaxation of the heart muscle. The heart muscle is a special kind of muscle known as cardiac muscle, which is unique as it is both striated (strong), can work without tiring, and cannot be controlled (the movement of the muscle is automatic).
the cardiac muscle
biceps is a kind of muscle, rib is a kind of bone.
Voluntary Smooth Muscle
smooth muscle.
ear muscle
The cardiac muscle.
The heart is a cardiac muscle
involuntary muscle
when sedimentary melts the heat squeezes the rock then it becomes a metamorphic rock.
The synergist muscle is a kind of muscle that performs or helps perform the same set of joint motion as the agonists. Synergist muscle acts on movable joints.