Muscle fibre. Computer artwork showing the structure of a muscle cell,also known as a muscle fibre. The cell is surrounded by a plasma membrane called the sarcolemma (cream). Within the cell are myofibrils,bundles of actin and myosin fibres (pink) surrounded by a sarcoplasmic reticulum (yellow). The sarcoplasmic reticulum holds a reserve of calcium ions,which are needed for contraction. Mitochondria (blue) within the myofibrils provide the energy needed for contraction | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Dalhoff, Henning |
Taille de l’image : | 5004 px × 3525 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |