Taguchi T
Arch Histol Jpn. 1986 Jun;49(2):243-54. doi: 10.1679/aohc.49.243.
The blood vascular bed of the rat carotid body was reproduced with methacrylate and observed under the scanning electron microscope. The carotid body received the proper carotid body artery from the common carotid body artery, which arose from the external carotid or occipital artery and gave off subsidiary branches to the tissues near the carotid body. The proper carotid body artery divided in the carotid body, ultimately breaking up into thick (main) or thin (subsidiary) arterial terminals to form the vascular plexus of the carotid body. This plexus contained both thick and thin capillaries. The thick capillaries arose from the thick and thin arterial terminals and formed the basic capillary network of the carotid body. The thin capillaries were only subsidiary, intercalated among the thick capillaries. A few accessory twigs of the proper carotid body artery passed through the carotid body and supplied the adipose and other tissues around the carotid body. Many venules arose from the thick capillaries of the carotid body and were collected into rostral and caudal efferent veins. These efferent veins received the veins from the tissues adjacent to the carotid body, and drained into the internal jugular vein. No arterio-venous anastomosis was found in, on or around the carotid body. The common carotid body artery and its subsidiary branches showed, at their origins, marked constrictions indicative of the arterial cushions, though the proper carotid body artery and its accessory twigs were not provided with such clear constrictions. These findings suggest that the inflow of blood into the common carotid body artery may be regulated by its constriction, especially of its arterial cushion, and that the subsidiary branches of the common carotid body artery and the accessory twigs of the proper carotid body artery may act as bypass-routes to eliminate the excessive inflow of blood into the carotid body. It is considered that the thin arterial terminals and thin capillaries may act as buffer channels to homogenize the blood flow within the carotid body.
用甲基丙烯酸酯复制大鼠颈动脉体的血管床，并在扫描电子显微镜下观察。颈动脉体从颈总动脉发出的颈总动脉体动脉获得合适的供血，该动脉起源于颈外动脉或枕动脉，并向颈动脉体附近的组织发出分支。颈总动脉体动脉在颈动脉体内分支，最终分成粗（主）或细（副）动脉终末，形成颈动脉体的血管丛。该丛包含粗、细两种毛细血管。粗毛细血管起源于粗、细动脉终末，形成颈动脉体的基本毛细血管网。细毛细血管只是辅助性的，插在粗毛细血管之间。颈总动脉体动脉的一些副支穿过颈动脉体，为颈动脉体周围的脂肪组织和其他组织供血。许多小静脉起源于颈动脉体的粗毛细血管，汇集到头侧和尾侧的传出静脉。这些传出静脉接收来自颈动脉体相邻组织的静脉，然后汇入颈内静脉。在颈动脉体内部、表面或周围未发现动静脉吻合。颈总动脉体动脉及其分支在起始处有明显的狭窄，提示有动脉垫，尽管颈总动脉体动脉及其副支没有如此明显的狭窄。这些发现表明，颈总动脉体动脉的血液流入可能受其狭窄尤其是动脉垫的调节，颈总动脉体动脉的分支和颈总动脉体动脉的副支可能起到旁路作用，以消除过多的血液流入颈动脉体。据认为，细动脉终末和细毛细血管可能起到缓冲通道的作用，使颈动脉体内的血流均匀化。
