肾小球旁器(Juxtaglomerularapparatus、JGA),是肾小管与血管球之间接触处的一种特殊结构,因位于肾小体附近而得名,又称近血管球复合体(Juxtaglomerular complex)。它由同一肾单位的入球和出球小动脉壁上的球旁细胞、致密斑、球外系膜细胞和肾小囊脏、壁层上皮移行处的极周细胞所组成。近年来,对其各成份的结构、功能及其相互关系的研究,取得了一些新的进展,现综述如下: Juxtaglomerula rapparatus (JGA), a special structure at the junction between tubules and glomeruli, is called Juxtaglomerular complex because it is located near the body of the kidney. It consists of the same nephron’s goal and the ball of articular cartilage cells on the ball, the dense spot, the ball of mesangial cells and renal cystic dirty, parietal epithelial migration at the peripheral cells. In recent years, some new developments have been made in the study of the structure, function and interrelationships of its components. The following is the summary of the study: