心肌、骨骼肌在光学显微境下 ,肌质中的肌丝集合体呈现暗相间的横纹 ,有Ｉ带、Ａ带、Ｚ线、Ｈ带、Ｍ线和肌节结构等 ;电子显微境下 ,肌丝集合体是由具有收缩功能的粗肌丝和细肌丝组成 ,其周围有大小、多少不等的横小管、肌浆网和线粒体等。这种肌丝集合体在骨骼肌的形态描述中 Myocardium, skeletal muscle Under light microscope, the myofilaments in muscle showed dark stripes with I-band, A-band, Z-line, H-band, M-line and sarcomere structure; electron microscopy Under the environment, myofilament aggregates by the contractile function of the thick myofilament and thin filaments, around the size, how many of the transverse tubules, sarcoplasmic reticulum and mitochondria. This myofilament assembly in the description of skeletal muscle morphology