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To the Editor, The following letter will highlight key information on muscles, contractions and fibres, and will hopefully be informative. Muscle Types Firstly, I will highlight the different types of muscle in the body. 1. Voluntary Muscles These are known as skeletal muscles, and are under our conscious control. They can also be known as striated, and examples of them include the Biceps and Triceps - they control movement at a joint. 2. Involuntary Muscles These are not under our conscious control, and are also known as smooth muscle. They are found in the walls of arteries, veins, stomach and intestines. 3. Cardiac Muscles Cardiac muscles are found in the heart, and are not under conscious control, either. They never die due to a rich oxygen supply. Muscles contractions Muscles function by contracting (they never . The origin of a muscle is always attached to a stationary bone, and acts as an anchor; the insertion inserts across a joint and attaches...

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