Huff and Puff

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Huff and Puff

• By Mrs. Berlingers 5th Period Class
• November 12, 2001

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Step One Inhaling

• Oxygen goes into body through 2 nose holes
• Oxygen can enter through your mouth
• Diaphragm contracts and moves down

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Step Two Nasal Cavity

• Air is warmed and moistened
• Pollen and dust gets trapped by nose hairs
  (cilia) and mucus

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Step Three Pharynx

• Oxygen comes from the nasal cavity and enters the
  pharynx
• Pharynx Tube for both food and oxygen
• Oxygen from nose and mouth meet here

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Step Four Epiglottis

• Flap of skin in the pharynx
• Closes over trachea when you are eating to
  prevent choking
• Like a door

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Step Five Larynx

• Oxygen comes from pharynx into the larynx (top of
  trachea)
• Air flows past vocal chords sound coming from
  vibrations
• Larynx another name is voice box allows you
  to speak

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Step Six Trachea

• Oxygen gone through larynx into rest of trachea
• Rings of cartilage to keep trachea open all the
  time
• About 12 cm long

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Step Six Trachea (cont.)

• Takes oxygen to bronchi and lungs
• Mucus traps pollen, dust and bacteria

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Step Seven Bronchi

• Oxygen comes from trachea to bronchi
• Carries air to lungs
• At lower end of trachea splits into two paths
  each called a bronchus

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Step Eight Bronchioles

• Smaller paths off each bronchus
• Oxygen comes from bronchi into bronchioles
• Lead to alveoli (air sacs)

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Step Nine Alveoli (Air Sacs)

• Oxygen from bronchioles goes through walls of
  alveoli to blood
• Grape-like clusters

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Exhaling

• Carbon dioxide EXITS blood into alveoli
• Carbon dioxide travels from alveoli to
  bronchioles to bronchi
• Carbon dioxide travels from bronchi to the trachea

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Exhaling (cont.)

• From the trachea, passed the larynx, through the
  pharynx
• Carbon dioxide EXITS through the nasal cavity or
  mouth
• Diaphragm relaxes and moves upward