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.
Kidney Structure and Function ï Once urine is formed, it passes into a cavity called the minor calyx. ï Multiple minor calyces drain into the major calyx. ï The major calyx empties into ureters that drain the kidney. ï From there, the ureters empty into the urinary bladder where urine is stored.