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www.reference.com/article/hydrogen-important-humans-7163c9d7dd78dbab

Hydrogen is a very important element for humans because it is one of the elements that comprises water, or H2O. It exists in human bodies and is used for a variety of important technologies as a renewable energy source and for other applications. Hydrogen is also considered by scientists to be one o

www.reference.com/article/hydrogen-peroxide-found-body-87cf7697abf11439

According to Discover Magazine, hydrogen peroxide is found naturally in the human thyroid, gut and lungs. Science Daily states that the compound is produced by the body to keep its cells healthy.

www.reference.com/world-view/hydrogen-peroxide-human-hair-1c878acd82caf480

Hydrogen peroxide lightens, or bleaches, human hair. People with blonde hair typically use it to lighten their locks, particularly in the winter months when there isn't a lot of sun.

www.reference.com/science/human-body-made-up-aef144249a02d3f5

According to About.com, water makes up between 65 and 90 percent of all cells in the human body. The remaining elements by mass include oxygen, carbon, hydrogen, nitrogen, calcium, phosphorus, potassium, sulfur, chlorine, sodium, magnesium and trace amounts of iron, cobalt, copper, zinc, iodine, sel

www.reference.com/article/human-bodies-need-oxygen-fe529ca0c58c9352

Oxygen is essential to human bodies for survival because it provides nutrients that are then transported throughout the body by the blood. Oxygen reaches human bodies through the air before being broken down and transported.

www.reference.com/science/many-body-parts-humans-8fac9a6a200aff24

Humans have many body parts including 206 bones and more than 600 muscles. Scientists discovered a new body part, a ligament in the knee now called anterolateral ligament in 2013 at the University of Leuven in Belgium.

www.reference.com/article/many-body-cells-human-f5d4a4795b41361e

According to a National Geographic article, the best available estimate of the number of cells contained in the human body is 37.2 trillion. The researchers who conducted the study added up the estimates for the total number of each type of cell to arrive at the total estimate.

www.reference.com/science/food-important-human-body-c152d05e67e6afa

Food is needed by the human body for energy, to repair and build cells and to prevent sickness and heal from it. While it is possible to obtain nutrients in a scientifically controlled manner, common food is the most efficient way of obtaining energy and nutrients.

www.reference.com/science/carbon-found-human-body-34189afa7b0b731c

Carbon is found in all organic molecules in the human body, which includes fats, carbohydrates, nucleic acids, and proteins. Carbon is also found in CO2 (carbon dioxide), a waste product of the body that is exhaled through the lungs.

www.reference.com/science/names-human-body-parts-30d5b4fae5cd8c54

The American Association of Anatomists explains the "Terminologica Anatomica" lists more than 7,500 named, human body parts in Latin, as of November 2014. The list of human body parts includes dozens of organs, more than 200 bones, hundreds of muscles, nerves, blood vessels and microscopic structure