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Rigor mortis is possibly one of the most well known of the taphonomic changes and is the process that causes the muscles in the body to stiffen resulting in rigidity due to a range of chemical changes in the muscle structure.

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the ability to spontaneously depolarize and generate an action potential. ... Contractility: the potential to do work, often measured as the ability of muscle tissue to develop tension or shorten.

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cardiac action potential purkinje fibers cardiac cells heart smooth muscle contraction skeletal muscle tissue cardiac conduction system sa node av node

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Excitability is a property of a cell, allowing it to respond to stimulation by rapid changes in membrane potential produced by ion fluxes across the plasma membrane.

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the ability to stretch a muscle to reach its full range of movement without restriction.

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the ability of a muscle to be stretched. For instance, let's reconsider our elbow flexing motion we discussed earlier. In order to be able to flex the elbow, the elbow extensor muscles must extend in order to allow flexion to occur. Lack of extensibility is known as spasticity.

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the ability of muscle cells to forcefully shorten.( muscles can only pull, never push.)

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facilitates the interaction between actin and myosin during contractions

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a superfamily of motor proteins best known for their roles in muscle contraction and in a wide range of other motility processes in eukaryotes.

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a protein that forms (together with myosin) the contractile filaments of muscle cells, and is also involved in motion in other types of cell.

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the mechanism of muscle contraction based on muscle proteins that slide past each other to generate movement.

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organs of the vertebrate muscular system

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involuntary striated muscle tissue found only in the heart

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Smooth muscle, also called involuntary muscle, muscle that shows no cross stripes under microscopic magnification. ... Smooth muscle tissue, unlike striated muscle, contracts slowly and automatically. It constitutes much of the musculature of internal organs and the digestive system.

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a condition marked by intermittent muscular spasms, caused by malfunction of the parathyroid glands and a consequent deficiency of calcium.

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Tetanus is an infection caused by bacteria called Clostridium tetani. When the bacteria invade the body, they produce a poison (toxin) that causes painful muscle contractions. Another name for tetanus is “lockjaw”. It often causes a person's neck and jaw muscles to lock, making it hard to open the mouth or swallow.

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Clonic spasms refer to alternating involuntary muscular contraction and relaxation in quick succession. Tonic spasms are rigid muscle contractions that last a period of time.

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a sudden involuntary muscular contraction or convulsive movement.

"shifting heavy loads without help brought on muscular back spasms"

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Muscle fatigue is a symptom that decreases your muscles' ability to perform over time. It can be associated with a state of exhaustion, often following strenuous activity or exercise. When you experience fatigue, the force behind your muscles' movements decrease, causing you to feel weaker.

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They control heartbeat, breathing, and digestion.

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Fascia is a thin casing of connective tissue that surrounds and holds every organ, blood vessel, bone, nerve fiber and muscle in place. The tissue does more than provide internal structure; fascia has nerves that make it almost as sensitive as skin.

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Tendons are the connective tissues that transmit the mechanical force of muscle contraction to the bones; the tendon is firmly connected to muscle fibres at one end and to components of the bone at its other end. ... A tendon is composed of dense fibrous connective tissue made up primarily of collagenous fibres.