摘要
应用甲基丙烯酸甲酯微血管铸型和扫描电镜技术，观察胎儿气管微血管的分布特点。气管动脉主要来自左右两侧甲状腺下动脉的气管食管支。气管血管呈节段性分布，气管两旁的纵行血管束分节段发出横行分支到各气管软骨环间，两侧的横行血管在气管前壁中线处吻合。气管后壁膜部血管来自气管动脉和食管动脉。气管内粘膜及软骨膜为毛细血管。毛细血管汇入其下层的静脉网。
The microvasculature of the human fetal trachea was studied in vascular casts viewed in a scanning electron microscope(SEM).The trachea is supplied by longitudinal vascular bundles run-ning at both sides of the organ,including both longitudinal tracheoesophageal arteries and veins.They are the source of the segment vascularization of the trachea. Due to numerous arterioveinous anastomoses and anastomoses occurring within respective arterious and veinous vascular systems,a constant blood flow within submucous capillary plexus and the tracheal wall is provided. A characteris-tic feature of tracheal vasoularization is a very rich,dense network of vein.
出处
《中华耳鼻咽喉科杂志》
CSCD
1994年第1期50-51,T003,共3页
Chinese Journal of Otorhinolaryngology
