The shoulder is one of the most mobile joints in the body. The muscles surrounding it accommodate the movement and provide stability.

Bodybuilders abdominal muscles

Man's trapezius

Shoulders

Bodybuilder

Black hiker standing on rock in remote area

Back muscles of naked fitness woman.

Rotator Cuff Exercises with Resistance Band

Young woman stretching arm

Man Flexing Arm Muscles on Beach, Rear View, Mid Section

Triceps extension exercise.

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Stat Pearls

Revista brasileira de fisioterapia

<div class="" data-block="true" data-editor="847gd" data-offset-key="8t9tm-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8t9tm-0-0"><span class="hardreadability"><span data-offset-key="8t9tm-0-0"><span data-text="true">The muscular system supports the movement of the body, the circulation of blood, and the process of digestion</span></span></span><span data-offset-key="8t9tm-1-0"><span data-text="true">. </span></span><span class="veryhardreadability"><span data-offset-key="8t9tm-2-0"><span data-text="true">The muscular system works </span></span></span><span class="adverb"><span data-offset-key="8t9tm-3-0"><span data-text="true">closely</span></span></span><span class="veryhardreadability"><span data-offset-key="8t9tm-4-0"><span data-text="true"> with the skeletal system, and together they form the musculoskeletal system</span></span></span><span data-offset-key="8t9tm-5-0"><span data-text="true">.</span></span></div>
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<div class="" data-block="true" data-editor="847gd" data-offset-key="dgn4t-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="dgn4t-0-0"><span data-offset-key="dgn4t-0-0"> </span></div>
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<div class="" data-block="true" data-editor="847gd" data-offset-key="fh9c2-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="fh9c2-0-0"><span data-offset-key="fh9c2-0-0"><span data-text="true">Though there are hundreds of muscles in our bodies, they are all made of the same thing. A muscle is a type of elastic tissue that consists of many small fibers. Like a rubber band, un-exercised muscles are quite brittle. Their elasticity improves with constant use. This is why athletes and performers take such care during warm-ups and stretches.</span></span></div>
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<div class="" data-block="true" data-editor="847gd" data-offset-key="3dc88-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="3dc88-0-0"><span data-offset-key="3dc88-0-0"> </span></div>
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<div class="" data-block="true" data-editor="847gd" data-offset-key="9b90n-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="9b90n-0-0"><span data-offset-key="9b90n-0-0"><span data-text="true">There are three muscle categories: smooth, cardiac, and skeletal. </span></span><span class="hardreadability"><span data-offset-key="9b90n-1-0"><span data-text="true">Smooth muscles are involuntary muscles, meaning you can't make them move by thinking about it</span></span></span><span data-offset-key="9b90n-2-0"><span data-text="true">. You can find smooth muscles in your stomach and bladder. Cardiac muscles are so named because they make up the heart. Skeletal muscles are the most common variety, responsible for posture and movement.</span></span></div>
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Anatomy

<div class="" data-block="true" data-editor="8v4h4" data-offset-key="1smsj-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="1smsj-0-0"><span data-offset-key="1smsj-0-0">Anatomy is a branch of biology. This branch of science in particular deals with organisms and their biological structure. Human anatomy, along with physiology and biochemistry, forms the basis of medicine.</span></div>
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<div class="" data-block="true" data-editor="8v4h4" data-offset-key="e054a-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="e054a-0-0"><span data-offset-key="e054a-0-0"> </span></div>
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<div class="" data-block="true" data-editor="8v4h4" data-offset-key="8jihb-0-0">
<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8jihb-0-0"><span data-offset-key="8jihb-0-0">Some parts that make up the body's structure are </span><span class="adverb"><span data-offset-key="8jihb-1-0">incredibly</span></span><span data-offset-key="8jihb-2-0"> complex. Take the circulatory system, for example, which contains the heart and blood vessels. This system </span><span class="complexword"><span data-offset-key="8jihb-3-0">handles a lot of responsibility.</span></span><span data-offset-key="8jihb-4-0"> many crucial functions. It transports blood, nutrients, waste products, immune cells, and clotting cells. It is also </span><span class="adverb"><span data-offset-key="8jihb-5-0">closely</span></span><span data-offset-key="8jihb-6-0"> tied to the lymphatic system and our immune system. </span></div>
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<div class="public-DraftStyleDefault-block public-DraftStyleDefault-ltr" data-offset-key="8jihb-0-0"><span data-offset-key="8jihb-6-0">As you can see, no one part of our anatomy functions completely separate from the others. </span>All the parts of the structure must get along in order for the body to function.</div>
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Muscular System

The Shoulder Muscles and Their Movement

5. Rhomboid Major and Minor

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