THE KIDNEY There are two organs innocently located in the back of the upper abdomen.Those renal organ seems so inconspicious.Yeah right! Together,they weigh about 300g-that's 30% of 1kg and about 0.4% of the body weight yet they get up to 25% of the total output of blood from the heart.Infact,sigth of renal blood vessels which are so large makes one decide at once that these must be important. The kidneys are composed of millions of nephrons which are functional unit and by which it partakes in whole body homeostasis,maintaining the internal bosy milieu via excreting waste products and retaining important subtances,regulating acid base balance,electrolyte concentration,extracellular fluid volume and concentration as well as blood pressure.Seems high sounding? Well,that's not all! It is important in calcium metabolism and stimulation opf red cells production via elaboration of hormones,yes it also acts an endocrine organ.

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