Tom Smart, Deseret News
A view of blood-vessel configurations in the face.

• The largest bone is the pelvis, or hip bone. In fact, it is made up of six bones joined firmly together.

• The smallest bone is the stirrup, deep in the inner ear. It is hardly bigger than a grain of rice.

• There are about 60 muscles in the face. Smiling is easier than frowning. It takes 20 muscles to smile and more than 40 to frown.

• The longest muscle in the body is the sartorius, from the outside of the hip, down and across to the inside of the knee. It rotates the thigh outward and bends the knee.

• The heart beats around 3 billion times in the average person's life.

• Within a tiny droplet of blood, there are some 5 million red blood cells, 300,000 platelets and 10,000 white blood cells.

• It takes about 1 minute for a red blood cell to circle the whole body.

• The skin secretes antibacterial substances. These substances explain why you don't wake up in the morning with a layer of mold growing on your skin — most bacteria and spores that land on the skin die quickly.

• Adults eat about 1,100 pounds of food per year.

• About 1.5 quarts of saliva are produced each day.

• The right lung is slightly larger than the left.

• The highest recorded sneeze speed is 102 miles per hour.

• The surface area of the lungs is roughly the same size as a tennis court.