It 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.
Muscle tissue is a soft tissue that composes muscles in animal bodies, and gives rise to muscles' ability to contract. This is opposed to other components or tissues in muscle such as tendons or perimysium. It is formed during embryonic development through a process known as myogenesis. Muscle tissue varies with function and location in the body. In mammals the three types are: skeletal or striated muscle; smooth or non-striated muscle; and cardiac muscle, which is sometimes known as semi-striated. 1 Smooth muscle, neither striated in structure nor under voluntary control, 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 tissue functions mainly as a source of power and motion in the body. Muscles' main responsibility is for changing or maintaining posture, locomotion, and movement of internal organs. The human body has about 650 muscles, which make up approximately half our bodyweight. All muscles are basically made of the same material, a kind of elastic tissue; packages of stretchable fiber-like material, similar to what goes into making a rubber band. Each muscle is made of thousands, and sometimes tens of thousands of small musculus fibers. 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). 1 Type I, slow twitch, or red muscle, is dense with capillaries and is rich in mitochondria and myoglobin, giving the muscle tissue its characteristic red color. 2  It can carry more oxygen and sustain aerobic activity using fats or carbohydrates as fuel. Working out can result in muscle soreness. While muscle soreness may sound simple enough, it can actually occur for a variety of reasons. Typically, muscle soreness is the result of lactic acid that builds up in the muscles during a workout. If you fail to stretch properly before and after a workout, this lactic acid stays in the muscles and, soon after, causes Muscle tissues are derived from the mesodermal layer of embryonic germ cells in a process known as myogenesis. There are three types of muscle, skeletal or striated, cardiac, and smooth. 1 Type I, slow twitch, or red muscle, is dense with capillaries and is rich in mitochondria and myoglobin, giving the muscle tissue its characteristic red color. 2  It can carry more oxygen and sustain aerobic activity using fats or carbohydrates as fuel. Functions of the Muscles. The Human muscular system is made up of a complex network of soft tissues which are called muscles. Muscle tissue is found throughout the human body and it has the following functions; 1  Movement. 2  Skeletal muscles attached to the skeleton move the body by moving bones. 1 Perimysium. 2  Within each skeletal muscle, the muscle fibers are separated into groups. 3  Each group, which resembles a bundle of sticks tied together, is called a fascicle (bundle). 4  Surrounding each fascicle is a layer of fibrous connective tissue called perimysium (around the muscle [fascicle]). 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 belly of the muscle is the fleshy part of the muscle in between the tendons that does the actual contraction. Names of Skeletal Muscles. Skeletal muscles are named based on many different factors, including their location, origin and insertion, number of origins, shape, size, direction, and function. 1  Location. 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 Type I, slow twitch, or red muscle, is dense with capillaries and is rich in mitochondria and myoglobin, giving the muscle tissue its characteristic red color. 2  It can carry more oxygen and sustain aerobic activity using fats or carbohydrates as fuel.
https://en.wikipedia.org/wiki/Muscle_tissue http://www.medicalnewstoday.com/articles/249192.php https://en.wikipedia.org/wiki/Muscle http://www.fitday.com/fitness-articles/fitness/exercises/what-is-muscle-soreness.html https://en.wikipedia.org/wiki/Muscle http://www.musclesused.com/ http://www.innerbody.com/image/musfov.html https://en.wikipedia.org/wiki/Muscle
what is muscle