Renal pelvis | Renal papilla |
It is the funnel-shaped dilated proximal part of the ureter in the kidney and is present on the inner side of hilum. It has projections called calyces. | It is the apex of a renal pyramid which projects into the lumen of a calyx of the kidney . Through the renal papilla, the collecting tubules discharge urine. |
Excretion | Catabolism |
The process by which the metabolic wastes from the body are removed by body's excretory system is known as the excretion. | The process which includes series of reactions which breaks down the complex molecules into simpler molecules , accompanied with the release of energy. |