猴下颌下腺微血管的三维结构

THREE-DIMENSIONAL MICROANGIOARCHITECTURE OF THE SUBMANDIBULAR GLAND IN MONKEY

猴下颌下腺有两种管径和构筑形式明显不同的毛细血管网,即腺泡周围毛细血管网和纹管周围毛细血管网。两种血管网分别由来自小叶内微动脉的毛细血管前微动脉供血。在两种毛细血管网之间藉,毛细血管和毛细血管后微静脉两种形式相连,后者又称为门脉血管。纹管周围毛细血管的回流血管形式为:1.先汇集成毛细血管后微静脉,再注入小叶内静脉;2.直接延续为小叶内导管周围毛细血管网。导管周围毛细血管网除借助毛细血管分别与腺泡及纹管周围毛细血管网相连外,还直接有导管周围毛细血管前微动脉供血。小叶内微动脉的管壁可见有环形缩窄。

In monkey submandibular gland there were two types of capillary networks, which were apparently different in calibre and architecture, i. e. the capillary networks around the acini and the capillary networks around the striated ducts. They originate from their respective precapillary arterioles stemed from intralobular terminal arterioles. Between the two types of capillary networks they are connected by both capillaries and postcapillary venules. The latter were called portal vessels. The capillary networks around the striated duct have two types of draining vessels. First, they converged to form postcapillary venules, which continued to form intralobular veins. Second, they directly continued to form the capillary networks around the intralobular ducts. The capillary networks around the intralobular ducts directly supplied blood through precapillary arteioles around the duct besides they connected respectively with the capillary networks around the acini and striated ducts through capillaries. Furthermore, a ring-shaped constriction was observed distinctly at the intralobular terminal arteriole.