Did you know that:
- Enamel, found in your teeth, is the hardest material in your body?
- The human head contains 22 bones?
- The human neck has the same number of vertebrae as a giraffe's?
- The lungs of an average adult, unfolded and flattened out, would cover an area the size of a tennis court?
- The left lung is smaller than the right lung to make room for the heart?
- When fully inflated, an adult's lungs can hold about 3 liters (0.79 gallons) of air?
- Humans shed about 600,000 particles of skin every hour, about 1.5 pounds (0.675kg) a year?
- By 70 years of age, the average person will have lost 105 pounds (480kg) of skin?
- There are 45 miles (72 km) of nerves in the skin of a human being?
- The longest single nerve in the human body runs through the leg and into the buttocks?
- The shoulder is the only joint in the human body that can rotate 360 degrees?
- The knee is the largest joint in the human body?
Bonus Question: What is the largest human organ?
