When skeleton muscles, also touched - and/or one designates transversetouched muscles those muscles, which are responsible for the arbitrary, active body movements particularly, for example the movement of arms and legs.

One finds deviating likewise to muscles of this type in the tongue, in the muscles of the larynx and in the musculature of the Zwerchfells, although its task is not the movement of the skeleton. In addition a special form of the transversetouched musculature is the heart muscle, which is not subject to the arbitrary control.

Skeleton muscles can one into red and white musculature divide. The red musculature (those its red coloration Myoglobin owed) is rather responsible for the persistent movements (outweighs thus with perseverance sportsmen). The white musculature can contract faster and implement stronger movements (forms thus with strength-haven-learn a substantial part of the muscle mass).

The attachment of a skeleton muscle been made by chords at the skeleton or at Faszien and is divided into beginning and origin.

Structure

A skeleton muscle consists to be of thousands of muscle fibers, up to 15 the cm long can (in the Schneidermuskel of the thigh even up to 30 or 40cm) and outside by connective tissue, which is coated Faszie. of this connective tissue, Septen so mentioned, coat again each individual muscle fiber and unite these to muscle fiber bundles, which form finally the muscle.

Each muscle fiber is composed of threadlike structures, the Myofibrillen in such a way specified. These pull next to each other the muscle fiber through full length and are composed of smaller units, the Myofilamenten. In these protein structures the muscle contraction runs by mutual Ineinanderschieben.

Under the microscope a clear traversing maturing is recognizable. This is because of it that the Myofibrillen is divided into segment-like sections into longitudinal direction, to the Sarkomeren. In this Sarkomeren Aktin and Myosin overlay differently closely, which makes the I, A and H-strip visible. Additionally there is still the Z-strip, which forms the partition between the individual Sarkomeren. Since only fiber-like structures, but no more individually distinguishable muscle cells are present, are the cell cores at the edge of the muscle fiber. The muscle fibers have therefore several cell cores, because they merged during the embryonalen development of humans in the nut/mother body from several cells. A muscle fiber cannot divide therefore also, whereby with muscle training only the fiber diameter becomes larger muscles (by increase of the number of different like e.g. Mitochondrien), which remain always alike number of fibers however.

To differentiate of the skeletal musculature is the smooth musculature, which for the automatic movements of the gastro-intestinal tract, which are responsible extension of the blood vessels etc.

Related links

• Structure of the muscle

further articles

• Musculature
• Nomenclature (anatomy)

Articles in category "Skeleton muscle"

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