猕猴腮腺微血管构筑的扫描电镜观察

SCANNING ELECTRON MICROSCOPY ON THE MICROVASCULATURE OF THE MONKEY PAROTID GLAND

本文在扫描电镜下观察了猕猴腮腺微血管的构筑。腮腺微血管的分布是在腺泡周围有稀疏的毛细血管网,在导管周围有密集的窦状毛细血管网。由小叶间动脉和小叶内动脉,发出腺泡微动脉和导管微动脉,再分别向腺泡和闰管周围发出并组成毛细血管网,以及纹管小叶内导管周围的毛细血管网。腺泡周围毛细血管网有3种引流形式:1.直接引流入静脉;2.通过毛细血管,引流入纹管周围毛细血管网;3.通过微静脉,引流入纹管周围毛细血管网。第3条通路可称为腮腺“门脉系统”。而纹管周围毛细血管网有两种引流形式。首先延续为小叶内导管周围毛细管网。其次,它们汇集成微静脉,与小叶内导管伴行。在腮腺内未见动-静脉吻合。但在小叶间有动-动脉及静-静脉的吻合。

The microvasculature of monkey parotid gland was observed by scanning electron microscope. The capillary networks around the acini were loose and the capillary networks around the ducts were dense and sinusoidal in type. The capillary networks around both the acini and intercalated duct and sinusoidal capillary networks around both the striated duct and intralobular duct were supplied by the blood passing through the acinar or duct arterioles from interlobular and intralobular artery. The capillary networks around the acini showed three draining forms: (1) draining into the vein directly; (2) draining into the capillary network around the striated duct through capillaries; (3) draining into the capillary network around the striated duct through venules. The latter form (venules) is named as 'portal system'. The capillary networks around the striated duct showed two draining forms: (1) they continued to form the capillary network around the intralobular duct; (2) they converged into venules which accompanied by the intralobular duct. The arterio-venous anastomoses were not observed in the parotid gland. However, arterio-arterial and venovenous anastomoses were found in interlobular region.