Respuesta :
Well, Lungs for breathing, Heart for pumping blood, and Liver for filtering toxins
Of these, 25 are found in living things. As you can see in the pie graph at the left, about 97 percent of your body's mass consists of just four major elements— oxygen, carbon, hydrogen, and nitrogen. The six most common elements in living things are carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.
