鸡胚静脉窦区发育的扫描电镜观察  

SEM OBSERVATION ON THE DEVELOPMENT OF THE SINUS VENOSUS IN CHICK EMBRYOS

作　　者：陈维平[1] 徐锦雯[1] 谢小熏[1] 

机构地区：[1]广西医科大学组织学与胚胎学教研室

出　　处：《广西医科大学学报》1996年第2期27-30,共4页Journal of Guangxi Medical University

摘　　要：利用显微解剖术，在扫描电镜下直接观察了孵育２．５～８ｄ（１６～３２期）鸡胚的静脉窦，结果：①第２．５天的鸡胚静脉窦借缩窄环与原始心房分界，第８天，静脉窦被完全吸收入右心房而消失；②窦房口瓣由静脉窦壁重叠凸人右心房而成，右瓣最早见于第３．５天，左瓣最早见于第３．５～４天；第４．５～５天，左瓣颅端延伸至右心房腹壁形成假隔；③静脉窦隔于第３～３．５天出现于静脉窦左角口与肝总静脉口之间，第８天与左、右窦房瓣基部融合，参与构成右心房背壁，并将窦房瓣分为颅侧的腔静脉瓣和尾侧的冠状窦瓣两部分。The development of sinus venosus of chick embryos( hatching from 2.5～8days)wasobserved with microdisection and SEM.①There was a narrowing ring forming a boundary be-tween the sinus venosus and the primary atrium at hatching 50～55h.The sinus venOsus athatching 8 days disappeared as it fully embeded into the right atrium. ②At hatching 3.5 days theright wall of the sinus venosus folded at the sinoatrial orifice,and then protruded grandually intothe lumen of the right atriuml forming the right valve of the sinoatrial orifice. At hatching 3.5～4days,the left valve appeared.The cranial part of the left valve extended to the ventral wallof the right atrium.③The sinus septum laid between the left horn of the sinus venosus and theheptic common vein at hatching 3～3.5 days,reaching the posterial wall of the right atrium, fus-ing with the right and left valves,and dividing into two parts;the cranial part formed the valveof the vena cava,and the caudai part formed the valve of the coronary sinus.

关 键 词：静脉窦 鸡胚 扫描电镜 

分 类 号：S831.1[农业科学—畜牧学] S852.1[农业科学—畜牧兽医]