The Body: A Guide for Occupants

Interesting Facts

• The human body is composed of approximately 37.2 trillion cells.
• The skin is the largest organ of the body, accounting for about 16% of total body weight.
• The human body contains enough iron to make a nail about 7.5 centimeters long.
• The human brain consumes about 20% of the body's energy, despite being only about 2% of its mass.
• On average, a person walks a distance equivalent to three times around the world in their lifetime.
• Every day, the human heart pumps about 7,500 liters of blood.
• The human skeleton is completely renewed every 10 years.
• The human nose contains about 400 different types of receptors that help distinguish smells.