WHAT'S INSIDE: BODY SYSTEMS

Your body is pretty amazing. At any given point you have many biological processes going on -- circulatory, digestive, brain & central nervous systems and more. Learn about these body systems as well as the eye, ears, nose and throat.
  • Brain & Central Nervous System
  • Circulatory System
  • Digestive System
  • Endocrine System
  • Eye, Ear, Nose & Throat
  • Immune System
  • Kidney & Urinary Tract
  • Lymphatic System
  • Musculoskeletal System
  • Respiratory System
FEATURED: BODY SYSTEMS
How much do you know about the human body?
FPO

Creatinine is a chemical molecule that is present in the serum (liquid portion) of the blood. The amount of creatinine produced depends on a person's muscle mass. But how is it measured?

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