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Muscular System (Name of Muscles (Frontalis-is a muscle that covers parts…

- - - - Orbicularis Oculi-circular-shaped muscle. It performs the actions of closing the eye and winking.
        
        Orbicularis Oris-is a complex of muscles in the lips that encircles the mouth. It performs the action of closing the lips.
        
        Zygomaticus-is a muscle of facial expression. It performs the actions of raising the corners of the mouth and smiling.
        
        Masseter-one of the two muscles that close the jaw. It performs the action of closing the jaw.
        
        Buccinator-a flat, thin muscle in the wall of the cheek. It performs the action of sucking in your cheek.
        
        Sternocleidomastoid-one of the most superficial cervical muscle. It performs the following actions:Laterally flexing neck, Rotating the head to opposite side, and Flexing neck forward.
        
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- - - - Smooth Muscle-consists of elongated cells, has no striations, forces fluids and other substances through internal body channels.
- - - - Abduction-moving parts away from the midline.
        
        Extension-straighten or increase angle at a joint.
        
        Flexion-bending a joint, decreasing the angle.
        
        Plantar Flexion-bending foot downward or pointing toes down.
        
        Eversion-moving foot outward.
        
        Inversion-moving foot inward.
        
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- - - - Muscle Fiber-an elongated multinucleate cell; it has a banded(striated) appearance.
        
        Myofibril-rod-like contractile elements that occupy most of the muscle cell volume. Composed of sarcomeres arranged end to end.
        
        Sarcomere-the contractile unit, composed of myofilaments made up of contractile proteins.