• The need to breathe
  You need to breathe to get oxygen from the air into your body. Your ...

• Breathing know-how
  Air goes in through your nose, then down your trachea (windpipe), ...

• Amazing But True
  You have about 300 million alveoli (air sacs) in each lung. They give ...

• In and out
  When you breathe in, your chest muscles pull your ribs up and out. ...

• Lung volume
  In a normal breath, you take in about 0.5 litres (0.8 pints) of air. ...

• Air amounts
  Each minute, a new-born baby breathes a total of 0.5 litres (0.8 ...

• Speedy sneezes
  Sneezing helps clear slimy mucus or dust from your nose. You inhale ...

• Coughs and colds
  Like sneezing, coughing is an automatic reaction which helps to clear ...

• Hick! Hick! Hick!
  Hiccups are short, sudden gasps of breath. They happen when your ...

• The high life
  The higher up you go, the lower the amount of oxygen in the air and ...