人腮腺微血管构筑

THE MICROVASCULATURE OF HUMAN PAROTID GLAND

用血管铸型扫描电镜法，观察人腮腺微血管的构筑，从铸型上看，腮腺各小叶的界限分明。小叶的表层为管径粗细一致的毛细血管，它们在腺泡和闰管周围相互吻合成毛细血管网。腺泡和闰管周围毛细血管网起自腺泡微动脉。腺泡微动脉主要起自小叶内动脉，但也可起自小叶间动脉。纹状管周围为毛细血管后微静脉和微静脉用互吻合形成的网状静脉丛。腺泡周围毛细血管通过毛细血管后微静脉注入纹状管周围的微静脉丛，然后注入小叶内静脉。小叶间导管起始部的周围，为一层由毛细血管和毛细血管后微静脉共同形成的微血管网，随着小叶间导管向总导管的延伸，其周围的微血管形成了内、外两层。内层为毛细血管和毛细血管后微静脉共同形成的微血管网，外层为微静脉和微动脉交织而成的血管丛。

he microvasculature of kuman parotid gland was studied by use of the technique ofscanning electron microscopic observation of vascular corrosion cast. The casts of parotidgland are lobulated nr pattern. The demarcation among the lobules is clear. In a lobule, theintralobular artery runs along the duct system and gives off branches which divide into capil-lary at tle superficial part of the lobule to surround the intercalated ducts and the acini.Sometimes tht interlobular artery also gives off branches which enter into the lobule and di-vide into the capillary of the acini The capillaries of acini gradually join together to formpostcapillary venule and venule plexus around the striated ducts before converging to in-tralobular vein There are two vascular layers around the interlobular ducts, i. e. an innernetwork formed by capillaries and postcapillary venules and an outer plexus formed by arteri-oles and venules.