用组织透明揭层铺片、组织切片及微血管铸型扫描电镜观察三种方法 ,观测了足月新鲜胎儿横结肠肠壁的微血管构筑。血管配布可分为四个层次 :浆肌层血管丛主要由缘动脉的长支、短支及粘膜下丛一级血管网发出的返支构成 ;环行肌层血管丛有特定的构筑形式 ,依次形成肌束间、肌束内及肌纤维血管 ,肌纤维血管呈细小的波浪状称为蚓状血管 ;粘膜下层血管丛呈“层状”分布 ,形成三级血管 ,其一级血管网为结肠器官内血管三维空间联系的交通枢纽 ;粘膜层血管丛呈近似圆柱体三维构筑形式 ,体现了均匀分布的粘膜腺及孤立淋巴滤泡轮廓。各层及每一部位的血管网网眼形状及密度均有差异 Three kinds of methods were used to observe the three kinds of methods, such as transparent tissue dissection, tissue section and microvascular cast scanning electron microscopy. The microvascular structure of transverse colon wall of full-term fetus was observed. Distribution of blood vessels can be divided into four levels: the main muscle layer of the vascular plexus by the long branches of the limbus, short branches and submucosal plexus vascular network issued a return to the composition; ring myometrial plexus has a specific form of construction, followed by The formation of muscle bundles, muscle bundles and muscle fiber blood vessels, muscle fibers showed small wavy wavy blood vessels; submucosal vascular plexus was “layered” distribution, the formation of three blood vessels, the first vascular network of the internal organs of the colon The three-dimensional space of blood vessels connected transport hub; mucosal vascular plexus was approximately cylindrical three-dimensional structure, reflecting the uniform distribution of mucosal glands and isolated lymphoid follicles profile. Each layer and every part of the vascular network mesh shape and density are different