Human Body Systems: Enzymes, Electrolytes & Metabolism

Body systems rely on a balance of electrolytes, enzymes, and hormones like cortisol. Understand fat metabolism, urinary output, and energy system functions.

Mid section view of a male doctor checking the blood pressure of a patient

Normal Creatinine Levels in Children

Published Aug,14 2017 | By Janet Renee, MS, RD

A pediatrician orders a creatinine test as part of a screening to check for decreased glomerular filtration rate. The GFR is directly linked to kidney function. Health care providers use this test to determine how well the kidneys are working. Pediatric reference ranges are based on the child's age.