The Respiratory System. Purpose of the respiratory system To provide a constant supply of oxygen to...
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![Page 1: The Respiratory System. Purpose of the respiratory system To provide a constant supply of oxygen to keep your body cells functioning To remove carbon.](https://reader036.fdocuments.net/reader036/viewer/2022062407/56649cb85503460f9497f3ef/html5/thumbnails/1.jpg)
The Respiratory SystemThe Respiratory System
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Purpose of the respiratory system
• To provide a constant supply of oxygen to keep your body cells functioning
• To remove carbon dioxide from the body cells
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Organs of the respiratory system• Nose / mouth• Nasal cavity• Pharynx (throat) • Epiglottis • Larynx • Trachea
• Bronchus (bronchi)• Bronchioles• Alveoli • Pleura • Diaphragm
Lungs
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Mouth & Nose
• Brings air into the body
• Nasal hairs in nostrils trap dust
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Nasal cavity
• Warms & moistens air
• Glands that produce sticky mucus line the nasal cavity – traps dust, pollen, and other materials that
were not trapped by nasal hairs – cilia sweep mucus and trapped material to
the back of the throat where it can be swallowed
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Pharynx
• Tube-like passageway used by food, liquid, and air
• At the lower end of the pharynx is a flap of tissue called the epiglottis
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Larynx
• “Voice box”
• The airway to which two pairs of horizontal folds of tissue, called vocal cords, are attached
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Trachea
• Air-conducting tube • Connects the larynx
with the bronchi• Lined with mucous
membranes and cilia
• Contains strong cartilage rings
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Bronchi
• Two short tubes that branch off the lower end of the trachea
• Carry air into the lungs.
• Singular - bronchus
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Bronchioles
• Tiny branches of air tubes in the lungs
• Connect bronchi to alveoli
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Alveoli
• Tiny, thin-walled, grapelike clusters at the end of each bronchiole
• Surrounded by capillaries
• Where carbon dioxide and oxygen exchange take place
• Singular - alveolus
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Pleura
• Membrane lining
the lungs and
chest cavity
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Diaphragm
• Muscle wall between the chest and the abdomen that the body uses for breathing
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Inhale 02, our diaphragm contacts and pulls down, rib expand, lungs Inflate
Exhale CO2, diaphragm relaxes and moves up our ribs go back in, and Our lungs deflate.
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