Sarcomere's long, fibrous proteins can relax to elongate muscle fibers or they can contract to shorten them— pulling on tendons and protective tissue to create the force propelling our athlete's body.

肌节的长纤维蛋白可以放松以拉长肌肉纤维，也可以收缩以缩短它们——拉动肌腱和保护组织以产生推动运动员身体的力量。

The extracellular component includes both the intravascular space - the space within the blood and lymphatic vessels and the interstitial space - the space between cells where you typically find fibrous proteins and long chains of carbohydrates which are called glycosaminoglycans.

细胞外的部分包括管道内空间，即血管和淋巴管内的空间以及间质空间，即细胞之间的空间，通常能找到纤维蛋白和叫糖胺聚糖（即黏多糖）的长链碳水化合物。