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 renal pelvis is a hollow collecting area in the centre of each kidney. The renal artery brings blood to the kidney, and the renal vein takes blood back to the body after it has passed through the kidney. The area where the renal artery, renal vein and ureter enter the kidney is called the renal hilum.Inside each kidney is a network of millions of small tubes called nephrons.he renal pelvis is a hollow collecting area in the centre of each kidney. The renal artery brings blood to the kidney, and the renal vein takes blood back to the body after it has passed through the kidney. The area where the renal artery, renal vein and ureter enter the kidney is called the renal hilum.