第七周人胚主要结构发育的研究

Histogenesis of the 7-week Human embryo

以组织学、组织化学PAS法、ATP酶法观察7周人胚标本的连续切片。7周胚胎体表可见脑泡、骨骼,头皮下可见皮下毛细血管丛。头、心脏、肝脏相对体积最大。软骨、消化和呼吸道上皮,血管上皮和平滑肌、心肌PAS阳性,肝细胞弱阳性。ATP酶除神经管周围间充质细胞阳性外,其余均阴性。

By means of ,PAS and ATPase histochemical methods ,We observed the 7-week human embryo. In 7-week embryo ,the brain vesicles and bones were seen on the surface. Scalp vascular plexus appears. Comparatively speaking .the volumes of the head .heart and liver are the largest. PAS-reaction revealed that cartlage ,digestive and respiratory tract epithelium .vascular epithelium and smooth muscle and cardiac muscle are positive. But the liver cells are a little positive. About ATPase reaction only undifferentiated mesenchymal cells around neural tube are positive .the others are negative.