Fascia is all collagen-based tissue, including the cells that create and maintain this network from the extracellular matrix (ECM). With this comprehensive definition, all tissues traditionally referred to in classical anatomy (fascia thoracolumbale, fascia lata, fascia pannicularis, fascia profundis) as fascia, as well as all other very similar tissues, such as; tendons, ligaments, bursa and all fascia in and around the muscles - endomysium, perimysium, epimysium. They are all largely synthesized from the same material (collagen) and in the same way. Organ fascia, which hold the organs in the peritoneum and mesenterium in the abdominal cavity, the mediastinum, pericardium and pleura, which hold the organs in the chest cavity, and the membranes - dura, pia and perineuria - which surround the brain, spinal cord and peripheral nerves, belong to the body fascia system. Cartilage has a core leather-like matrix of collagen and thus belongs to the definition of fascia.
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