Muscle fibres, SEM

Numéro d’image : 12528151
Muscle fibres, SEM
Skeletal muscle. Coloured scanning electron micrograph (SEM) of skeletal (striated) muscle. The muscle fibres are extremely long, cylindrical cells. One of the fibres has been cut open to expose thin threads called myofibrils. Myofibrils are formed of alternating bands of the proteins actin and myosin, which give the fibres a striped appearance. The proteins slide over each other to allow the muscle to contract. Connective tissue (yellow) forms a sheath known as the endomysium, which holds the muscle fibres together. Skeletal muscle attaches to the skeleton and is controlled by the voluntary nervous system. Magnification: x670 when printed 10 centimetres wide.
Licence : Droits gérés
Crédit: Science Photo Library / EYE OF SCIENCE
Taille de l’image : 4000 px × 4000 px
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Property Release : Non requis
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