• How long can you hold your breath?
  You can probably hold your breath for about a minute. The longer you ...

• How do you talk?
  When you breathe out, the air passes over the vocal cords in the ...

• What happens when you sneeze?
  When you sneeze, air rushes down your nose like a mini hurricane at ...

• Why does running make you puff?
  Muscles use up oxygen as they work. When you run, your muscles are ...

• What happens when you hiccup?
  Sometimes the diaphragm begins to contract in short, sharp spasms. ...

• Why do you cough?
  You cough when extra mucus, dust or other particles clog the air ...

• Is loud noise dangerous?
  Any noise over about 120 decibels can damage your hearing ...

• What is earwax?
  This yellow-brown wax is made by glands in the skin lining the ear ...

• Where does the Eustachian tube go?
  This tube joins the middle ear to the empty spaces behind your upper ...

• Why do you get dizzy?
  If you spin around and around and then stop, the world seems to carry ...