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第三节肌组织肌组织又称肌肉组织,是由肌细胞构成的组织。肌细胞的结构特点是细胞内含有大量的肌丝,功能特点是能进行收缩运动。肌细胞细而长,呈纤维状,因此又称肌纤维。此外,在肌细胞间隙中,还有少量疏松结缔组织。肌组织可分为三类。即:平滑肌、心肌与骨骼肌(图2-1)。一、平滑肌平滑肌主要分布于内脏器官,如血管、消化管、膀胱等。平滑肌细胞为梭形,其长短随器官而
Third Muscle Muscle tissue, also known as muscle tissue, is composed of muscle tissue. The structural feature of muscle cells is that the cells contain a large number of myofilaments, the function is characterized by the contraction movement. Muscle cells thin and long, was fibrous, so also known as muscle fibers. In addition, there is a small amount of loose connective tissue in the intercellular space. Muscle tissue can be divided into three categories. Namely: smooth muscle, myocardium and skeletal muscle (Figure 2-1). First, smooth muscle Smooth muscle is mainly distributed in internal organs, such as blood vessels, digestive tract, bladder and so on. Smooth muscle cells are fusiform, the length of which with the organ