The Macula Densa attaches
The Macula Densa attaches one structure in this organ to another. Another structure found in this organ has mesangial, epithelia, and endothelial cells, and that structure contains a basement membrane of capillaries. That structure in this organ is surrounded by the Bowman's Capsule, and other structures in this organ include the proximal and distal tubules, the Loop of Henle, and the Glomerulus. Ureters leave these organs, and the adrenal glands can be found on top of these organs. Nephrons are the functional units of, for 10 points, these organs responsible for cleaning out the blood.
The Macula Densa attaches one structure in this organ to another.
the {kidneys}