1. We use only 10 percent of our brains.

2. A human cannot live without a stomach.

3. The human digestive tract is only a few centimeters long.

4. The role of the kidneys is to help process waste.

5. In humans the kidneys are located in the chest.

6. The retina is the lens at the front of the eye.

7. The spleen is part of the lymphatic system.

8. An organ is any useless body part.

9. The cardiovascular system acts in isolation from other organs.

10. The human body’s largest organ is the liver.