A soft tissue
The gross anatomy of a muscle is the most important indicator of its role in the body. There is an important distinction seen between pennate muscles and other muscles. In most muscles, all the fibers are oriented in the same direction, running in a line from the origin to the insertion. 1 Smooth muscle or involuntary muscle is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair). Nevertheless, the exact number is difficult to define because different sources group muscles differently, e.g. regarding what is defined as different parts of a single muscle or as several muscles. Examples range from 640 to 850. The muscles of the human body can be categorized into a number of groups which include muscles relating to the head and neck, muscles of the torso or trunk, muscles of the upper limbs, and muscles of the lower limbs. The action refers to the action of each muscle from the standard anatomical position.  The rest of the muscles make up the tongue’s body. They’re what give it the ability to contort into endless arrays of shapes and postures. They allow it to lengthen, shorten, curl, flatten and round, and they provide shape to assist in speaking, eating and swallowing. But one thing’s certain: the tongue is definitely not the strongest muscle in the body. Maybe people continue to believe in its power simply because the tongue is weird; it’s literally inside your face, and people like superlatives. The muscular system is responsible for the movement of the human body. Attached to the bones of the skeletal system are about 700 named muscles that make up roughly half of a person’s body weight. Each of these muscles is a discrete organ constructed of skeletal muscle tissue, blood vessels, tendons, and nerves. Muscle tissue is also found inside of the heart, digestive organs, and blood vessels. In these organs, muscles serve to move substances throughout the body.... The muscles responsible for the body’s posture have the greatest endurance of all muscles in the body—they hold up the body throughout the day without becoming tired. Another function related to movement is the movement of substances inside the body. The muscles of the chest and upper back occupy the thoracic region of the body inferior to the neck and superior to the abdominal region and include the muscles of the shoulders. In addition to moving the arm and pectoral girdle, muscles of the chest and upper back work together as a group to support the vital process of breathing. The diaphragm is a strong, thin, dome-shaped muscle that spans the entire inferior border of the rib cage, separating the thoracic cavity from the abdominal cavity. 1 The statement that the tongue is the strongest muscle in the body appears frequently in lists of surprising facts, but it is difficult to find any definition of strength that would make this statement true. 2  Note that the tongue consists of eight muscles, not one. 1 Smooth muscle or involuntary muscle is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair). Muscle is a soft tissue found in most animals. Muscle cells contain protein filaments of actin and myosin that slide past one another, producing a contraction that changes both the length and the shape of the cell. Muscles function to produce force and motion. 1 Smooth muscle or involuntary muscle is found within the walls of organs and structures such as the esophagus, stomach, intestines, bronchi, uterus, urethra, bladder, blood vessels, and the arrector pili in the skin (in which it controls erection of body hair). Muscles are how we move and live. All movement in the body is controlled by muscles. Some muscles work without us thinking, like our heart beating, while other muscles are controlled by our thoughts and allow us to do stuff and move around. There are over 650 muscles in the human body.  From time to time, you'll see lists of interesting facts about the human body. Many times these lists will claim that the tongue is the strongest muscle in the human body. This is incorrect for a couple of reasons. First, the tongue isn't a single muscle. It's actually made up of eight different muscles. Now let's take a look at those muscles that might have a valid claim to the title of strongest muscle. If you define strength to mean the ability to exert the most pressure, then the strongest muscle in the human body is the masseter muscle. Of course, you probably call the masseter your jaw muscle.
https://en.wikipedia.org/wiki/Muscle https://en.wikipedia.org/wiki/List_of_muscles_of_the_human_body http://www.scientificamerican.com/article/fact-or-fiction-the-tongue-is-the-strongest-muscle-in-the-body/ http://www.innerbody.com/image/musfov.html http://www.innerbody.com/anatomy/muscular/upper-torso https://en.wikipedia.org/wiki/Muscle https://en.wikipedia.org/wiki/Muscle http://www.ducksters.com/science/muscles.php http://wonderopolis.org/wonder/what-is-the-strongest-muscle-in-your-body/
what is a muscle in the body