JuXtaglomerular Apparatus (球旁复合体) 山 Juxtaglomerular cells球旁细 胞 Glomerular epithelium Renin-producing granular cells 口 Macula densa致密斑 Afferent arterio a Extraglomerular mesangial cels球外系膜细胞 Internal elastic Macula densa lamina ooth muscle cells Distal tubule Basement membraneJuxtaglomerular Apparatus （球旁复合体） ❑ Juxtaglomerular cells球旁细 胞 Renin-producing granular cells ❑ Macula densa致密斑 ❑ Extraglomerular mesangial cells球外系膜细胞