• the nose traps and filters up to 70% of the 20 billion dust particles that we inhale each day, changes the temperature of the incoming air and regulates humidity.

• there are 110 different rhinoviruses, the most common cause of cold, plus about 90 other kinds of cold-causing viruses.

• the fastest sneeze ever recorded was clocked at just over 100 mph (more than 160 kph).

• your nose contains 20 types of odor-detecting cells. With these, you can distinguish up to 10,000 different smells.

• the tongue has 10,000 taste buds, but they can detect only four basic taste sensations – sweet, sour, bitter and salty.

• the mouth produces about a quart (2 pints) of saliva each day.