Respiratory system
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Respiratory System. Respiratory System. Respiration Breathing – intake of oxygen and expel of carbon dioxide Cellular respiration – cell making ATP Exchange of gases between atmosphere, blood, and cells. Components. Nose/mouth – take in air Pharynx – windpipe – passageway for air

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Respiratory System

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Respiratory system

Respiratory System


Respiratory system1

Respiratory System

  • Respiration

    • Breathing – intake of oxygen and expel of carbon dioxide

    • Cellular respiration – cell making ATP

    • Exchange of gases between atmosphere, blood, and cells


Components

Components

  • Nose/mouth – take in air

  • Pharynx – windpipe – passageway for air

  • Larynx – voice box

  • Trachea – passageway for air

  • Bronchi – branching of trachea into 2 lungs

  • Bronchioles – smaller branches of bronchii

  • Alveoli – sac at the end of bronchioles, where gas exchange occurs


Components1

Components


Breathing

Breathing

  • Involves the diaphragm

  • Muscle that separates thoracic cavity from abdominal cavity

  • When diaphragm contracts, it drops and air is taken in

  • When diaphragm relaxes, it rises and air is pushed out


Pathway of air

Pathway of Air

  • In through nose/mouth – filled with oxygen

  • Down pharynx, through trachea/larynx

  • Into bronchi, through bronchioles, into alveoli

  • Oxygen diffuses into capillaries, carbon dioxide diffuses into alveoli

  • Carbon dioxide travels back through passageways out of body


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