1. The smallest bones in the body are found in the ear. T
TRUE.  In children, these bones are smaller than a grain of rice.
2.  Over half the bones in your body are located in your back. F
FALSE.  Over half are located in the hands and feet.
3.  There is only one bone in your body that is not connected to another bone. T
TRUE. The hyoid bone, located at the base of the tongue in your throat, is held in place by ligaments / tendons and touches no other bone.
4.  Bone is the hardest substance in your body. F
FALSE.  It is the second hardest, after tooth enamel.
5.  You are taller in the morning than you are in the evening. T
TRUE.  By about a half-inch!  During sleep, cartilage pads between vertebrae soak up water and expand the backbone.  Gravity and walking around cause the backbones to compress once again during the day. As you grow older, you may shrink permanently because the cartilage pads often thin out with age.
6.  You don't need a cast for a broken rib. T
TRUE.  Your chest muscles hold it in place.
7.  Most of your bone is made of water. F
FALSE.  About 45% is the same type of mineral deposits found in some rocks (mostly calcium, phosphates, magnesium). About 30 is living tissue (cells, blood vessels, etc.) and about 25% of the bone is water.
8.  About 50% of the critters on earth do not have a backbone or spine. F
FALSE.  About 97% of animals on earth do not have backbones.
9.  You have fewer bones when you are born than when you die. F
FALSE.  At birth, the body has more than 300 bones. By adulthood, there are 206 because many have "fused" together.
10.  1 out of 20 people in the world has an extra rib. T
TRUE.  This is 3 times more common in males.
11.  The more you exercise your muscles, the stronger your bones become. T
TRUE.  Weight bearing exercises increase bone density.
12.  The only time you can truly "Sit up straight" is when you are a baby. T
TRUE.  Babies are born with a straight spine that becomes curved when they begin to sit up and walk. The curves in the vertebral column are needed for balance.
13. Elderly individuals may develop an even greater natural curvature of the spine, which is not actually a sign of disease. T
TRUE.  Right handed people curve to the right, left-handed people curve left.