元素是構成這個世界所有物質的「原料」,水、空氣、地面到人類,都是由元素所構成。
人體的主要元素在體內是以什麼樣的型態存在,以及發揮什麼樣的功用。氧、碳、氫、氮、磷、硫是水及氨基酸(蛋白質的構成單位)、糖等的構成要素。而金屬原則是骨骼的構成要素,或以溶於體液中的離子等型態存在。
Elements are the "raw materials" that make up all substance in this world. Water, air, ground and human beings are all constituted of elements.
The main elements of the human body exist in what form in the body and what functions they perform.Oxygen, carbon, hydrogen, nitrogen, phosphorus, and sulfur are the constituent elements of water, amino acids, and sugar. Metals are the elements of bones or exist in the form of ions that dissolved in body fluids.