By proportion of total body mass, here are the key building blocks of you. Delve into the top 10 elements in the body: the fundamental building blocks that compose the marvel that is the human form. From the essential role of oxygen in every breath to the significance of carbon as the backbone of life, this is the intricate chemical composition hidden within. The human body elements also include chlorine, sodium, sulphur, potassium, phosphorous, calcium, nitrogen, and hydrogen. Follow BBC Science Focus for more enlightening insights into the wonders of the human body.