Muscles are very important for the body. Muscles also do a lot for your body. They pump blood through your body, help you lift heavy objects, and most importantly, help your body in almost every way. Muscle is a body tissue that can contract and produce movement (Merriam-Webster Dictionary). Muscles are like the engine of the body; they transform energy into movement. Muscle tone is not as important as muscles, but it is very good for the body. Then there is muscle strength, which is a component of physical fitness that is just like muscle tone (DifferenceBetween.net. June 2, 2010). Muscle strength is a person's ability to exert force on physical objects using muscles (a bundle of many cells is what makes up a muscle, and this is also what makes up a fiber. Compared to the cells in your body, fibers muscle fibers are large. Myofibrils are cylinders of muscle proteins, and those muscle proteins allow muscle cells to function (. Craig Freudenrich, Ph.D.). also see what myofibrils look like (Daydream).3 Muscle contraction is a long process. First it goes through many different phases, an electrical signal, an action potential, travels along a nerve cell, causing it to release a chemical message, known. as a neurotransmitter, in a small gap between the nerve cell and the muscle cell. This gap is called a synapse, neurotransmitter, crosses the gap and binds to a protein called a receptor on the membrane of the muscle cell and causes an electrical signal. , action potential, in the muscle cell.The chemical signal, action potential, spreads rapidly along the muscle cell.... .. middle of paper ......ng muscle.(shape) (Stronglifts) . Vitamin C is useful for muscle building, muscle tone and muscle strength because it is responsible for the health of blood vessels, which support the muscles' needs for oxygen and nutrients (fitness). The best way to increase muscle strength is to lift weights. This is the fastest and best way to increase muscle strength. The best weight lifting strategies for increasing muscle strength are squats, bench presses, military presses, barbells, deadlifts, power cleans, chin ups and pull ups. Muscles are very confusing, but once you understand the physics of them, they're pretty cool. There are many different types of muscles and many different types. I wonder what scientists will find next about muscles and muscle strength? I also wonder how quickly you can build muscle strength or how long it would take?