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 open cavity in the medial concavity of the kidney â the renal sinus â is partly occupied by the calyces and the renal pelvis. The calyces act as conduits for urine to leave the medulla and enter the ureters.There are minor calyces and major calyces.Each minor calyx is a funnel shaped structures that surrounds a renal papilla and collects urine from it through the area cribrosa (sieve-like apparatus).he calyces act as conduits for urine to leave the medulla and enter the ureters. There are minor calyces and major calyces. Each minor calyx is a funnel shaped structures that surrounds a renal papilla and collects urine from it through the area cribrosa (sieve-like apparatus).