Human Kidney Structures Anatomy Model Manufacturer, Supplier and Exporter for Biology Lab - This 3 models set shows the basic structure of the kidney. The first model, a frontal section of the kidneyenlarged 3 times, illustrates the adrenal gland, cortex, medulla, pyramids with papillae, renal pelvis and blood vessels. The second model, representing a nephron enlarged 120 times, shows a renal tubules, a collecting tube system and Henle's loop. The third one illustrates Malpighian corpuscle with the Bowman's capsule, 700 times life size.