Elements in the human body

Which of these elements makes up the greatest of the average human body by mass?

• Carbon

• Hydrogen

• Nitrogen

• Oxygen

Which of the following elements has key roles in fluid balance and normal nerve and muscle function?

• Calcium

• Chlorine

• Sodium

• Sulfur

Which element is involved in bone mineralization?

• Calcium

• Copper

• Chlorine

• Hydrogen

Which elements is part of hydrochloric acid, which is involved in the digestive process?

• Nitrogen

• Sulfur

• Chlorine

• Magnesium

Which of the following elements is found in our blood and helps carry oxygen from the lungs to our bodies' cells?

• Iodine

• Potassium

• Copper

• Iron

Deficiency of which element increases the risk of osteoporosis, rickets or arthritis?

• Calcium

• Sulfur

• Phospohorus

• Hydrogen