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The English form bicep, attested from 1939, is a back formation derived from misinterpreting the s of biceps as the English plural marker -s. [24] [25] Adriaan van den Spiegel called the biceps a Pisciculus) [26] due to its fusiform shape, which is why in the Italian-language medical literature it is sometimes called il pescetto, "the small fish".
The antagonistic pair of biceps and triceps working to flex the elbow. Antagonist and agonist muscles often occur in pairs, called antagonistic pairs. As one muscle contracts, the other relaxes. An example of an antagonistic pair is the biceps and triceps; to contract, the triceps relaxes while the biceps contracts to lift the arm.
Skeletal muscle, is a type of striated muscle, composed of muscle cells, called muscle fibers, which are in turn composed of myofibrils. Myofibrils are composed of sarcomeres, the basic building blocks of striated muscle tissue. Upon stimulation by an action potential, skeletal muscles perform a coordinated contraction by shortening each sarcomere.
Pennate muscles are usually found where their length change is less important than maximum force, such as the rectus femoris. [16] Skeletal muscle is arranged in discrete muscles, an example of which is the biceps brachii. The tough, fibrous epimysium of skeletal muscle is both connected to and continuous with the tendons.
Muscles are often classed as groups of muscles that work together to carry out an action. In the torso there are several major muscle groups including the pectoral , and abdominal muscles ; intrinsic and extrinsic muscles are subdivisions of muscle groups in the hand , foot , tongue , and extraocular muscles of the eye .
Henry Cavill explains why he "reloaded" his biceps in the bathroom fight scene in Mission: Impossible - Fallout.
The biceps femoris (/ ˈ b aɪ s ɛ p s ˈ f ɛ m ər ɪ s /) is a muscle of the thigh located to the posterior, or back. As its name implies, it consists of two heads; the long head is considered part of the hamstring muscle group, while the short head is sometimes excluded from this characterization, as it only causes knee flexion (but not hip extension) [1] and is activated by a separate ...
A skeletal muscle cell is long and threadlike with many nuclei and is called a muscle fiber. [3] Muscle cells develop from embryonic precursor cells called myoblasts. [1] Skeletal muscle cells form by fusion of myoblasts to produce multinucleated cells in a process known as myogenesis.