Isotopes when written out are common nouns, and should begin with the uncapitalized element name, followed by a hyphen (not an em dash or en dash) and then the mass number. Examples are carbon-14 and uranium-235.
The central region of the kidney contains the renal pelvis, which is located in the renal sinus, and is continuous with the ureter. The renal pelvis is a large cavity that collects the urine as it is produced. The periphery of the renal pelvis is interrupted by cuplike projections called calyces.
The kidney is covered by a thin connective tissue capsule and consists of an outer cortex and medullary pyramid or papillae (Kidney).Within these two regions are found the components of the structural and functional unit of the kidney, the nephron.rinary Tubular System. The urine in the collecting tubules is collected in the renal pelvis and exits the kidney in the ureter. The ureter travels to the bladder, where the urine can be stored.