When viewed from a microscope, there is no striation presented in the muscle, and moreover, since it is no controlled by our willpower, it is called involuntary, nonstriated muscle.
从纤维

察,平滑肌无横纹状结构,平滑肌不随人的意志收
,故称不随意肌非横纹肌。
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For me personally, if I try to maintain 10-11% body fat, so like full six-pack, like some veins in the abs, quad striation, separation, you know, face chiseled slash gone at a time, I really struggle to make progress.
对我来说,如果我试图保持10%-11%的体脂百分比,也就是全身六块腹肌,腹部有些静脉突出,大腿肌肉线
明显,面部棱角分明,那么我真的很难取得进步。
Like skeletal muscle fibers, cardiac muscle cells have striations. Like smooth muscle fibers, each cardiac muscle cell has only one nucleus and its contraction and relaxation are not under conscious control. Therefore, it is also called involuntary striated muscle.
像骨骼肌纤维一样,心肌细胞也有
。像平滑肌纤维一样,每个心肌细胞只有一个核而且其收缩和舒张不受意识控制。因此,它也被称为非随意横
肌。