Primary excretory organs found in the human body are the kidneys,urinary bladder, ureters which involved with the creation and discharge of urine. By means of working together by these organs, much of the nitrogenous waste of the body, especially urea, is expelled.
The renal artery enters the kidney. It arises directly from the dorsal aorta and brings oxygenated blood containing excretory products. A narrow tube called ureter connects the kidney to tje urinary bladder where urine is expelled.
That scrape on our knee will never heal and the blood loss due to bleeding will never be replaced. This is because RNA is inside of cells and without the ability to create new RNA you cannot replace missing cells. So the scrape will never heal if your cells cannot create new RNA.
