How much water is in an adult human body? Anatomy & Physiology The Human Body Organization of the Human Body 1 Answer BRIAN M. May 24, 2016 Approximately 70% of the human body is composed of water. Answer link Related questions What the chemical messengers that travel in the blood? What are the different body systems in human body and what are their functions? What major roles does RNA play in the body? Where exactly is DNA found in the body? What are the biggest difference between DNA and RNA? How are the mind and body related? How many molecules are in the human body? What are five different ways the body maintains homeostasis? What organs are located on the left side of your body below the rib cage? How can the heart beat when it is outside of the body? What is the "trunk" of the body? Where is it located? See all questions in Organization of the Human Body Impact of this question 2902 views around the world You can reuse this answer Creative Commons License