Respiratory System

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Respiratory System
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Function of Respiratory System

• Supplies oxygen to the blood and removes carbon
  dioxide.
• Breathing fresh air moves into your lungs and
  stale air out.
• Respiration chemical reaction that mixes oxygen
  with glucose to release energy.

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Organs in Respiratory System

• Nostrils hair traps dust from air.
• Pharynx passageway for food in the esophagus or
  air in the trachea.
• Larynx airway to which vocal cords are attached.

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• Trachea lined with mucous and cilia to trap
  dust, bacteria, and pollen.
• Bronchi carry air to the lungs
• Bronchioles clusters of tiny alveoli.
• Lungs

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Breathing

• Alveoli are surrounded capillaries.
• Oxygen and carbon dioxide are diffused through
  the walls.

See the respiratory system in action!
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Inhale

• Diaphragm moves down.
• Rib cage moves upward.
• Increases volume of chest cavity.
• Pressure forces air in.
• Lungs expand as they fill up with air.

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Exhale

• Diaphragm moves up.
• Rib cage moves downward.
• Decreases volume of chest cavity.
• Lungs return to position.
• Pressure forces air out.

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Respiratory Disorders

• Bronchitis too much mucous in bronchial tubes.
• Emphysema alveoli are unable to expand and
  contract (cant push air out of the lungs).
• Cancer tar from cigarette smoke and other
  pollutants trigger uncontrolled growth of cells.
• Asthma an attack is when the bronchial tubes
  contract quickly.

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• Factoids
• Your lungs contain almost 1500 miles of airways
  and over 300 million alveoli.
• Every minute you breathe in 13 pints of air.
• Plants are our partners in breathing. We breathe
  in air, use the oxygen in it, and release carbon
  dioxide. Plants take in carbon dioxide and
  release oxygen. Thank goodness!
• People tend to get more colds in the winter
  because we're indoors more often and in close
  proximity to other people. When people sneeze,
  cough and even breathe -- germs go flying!

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• Why Do I Yawn?     When you are sleepy or drowsy
  the lungs do not take enough oxygen from the air.
  This causes a shortage of oxygen in our bodies.
  The brain senses this shortage of oxygen and
  sends a message that causes you to take a deep
  long breath---a YAWN.Why Do I Sneeze?     Sneezi
  ng is like a cough in the upper breathing
  passages. It is the body's way of removing an
  irritant from the sensitive mucous membranes of
  the nose. Many things can
• irritate the mucous membranes. Dust, pollen,
  pepper or even a cold blast of air are just
• some of the many things that may cause you to
  sneeze.

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• What Causes Hiccups?    Hiccups are the sudden
  movements of the diaphragm. It is involuntary ---
  you have no control over hiccups, as you well
  know. There are many causes of hiccups. The
  diaphragm may get irritated, you may have eaten
  to fast, or maybe some substance in the blood
  could even have brought on the hiccups.