HUMAN BODY -RESPIRATORY SYSTEM

OUR BODY HAS A BLOOD TRANSPORT SYSTEM.It supplies the oxygen needed by the body cells and carries off their carbon-Di-oxide waste.Lungs work very hard .Every day we take. about 23,000 breaths.Lungs are connected to a wind pipe called trachea .Each comprises many branching tubes called bronchioles.The air inhaled by us passes via the trachea into the lungs.Blood in the lungs collects oxygen and takes it around the body.This air is warmed to body temperature and saturated with water vapour.When we breathe out ,our lungs pushed used air out through our nose or mouth.Sometimes , we inhale foreign particles with air that are trapped and expelled by coughing .The mechanical work required to ventilate the lungs, is done by respratory muscles.The Larynx is a part of the respiratory tract,it is the organ of pho-nation.Its &nbsp ; function is to raise airway pressure during sneezing and coughing.
FACTS-

At rest ,the body takes in and breathe out about 10 liters of air each minute.

The right lung is slightly larger than the left.

Hairs in the nose help to clean the air we breathe,as well as in warming it.
LUNGS

The highest recorded "sneeze speed" is 105 km per hour.

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