Podcast
Questions and Answers
What is the primary function of the epiglottis?
What is the primary function of the epiglottis?
- To filter inhaled air
- To produce sound
- To prevent food from entering the trachea (correct)
- To moisten the nasal cavity
The alveoli are responsible for filtering the air taken into the lungs.
The alveoli are responsible for filtering the air taken into the lungs.
False (B)
What is the passageway for both air and food in the respiratory system called?
What is the passageway for both air and food in the respiratory system called?
Pharynx
The _____ are tiny air sacs in the lungs where gas exchange occurs.
The _____ are tiny air sacs in the lungs where gas exchange occurs.
Match the following components of the respiratory system with their functions:
Match the following components of the respiratory system with their functions:
Flashcards
Respiratory System Function
Respiratory System Function
Exchanges gases in the body, specifically oxygen and carbon dioxide.
Epiglottis Function
Epiglottis Function
A flap that prevents food from going down the trachea during swallowing.
Alveoli Function
Alveoli Function
Tiny air sacs in the lungs where gas exchange occurs.
Bronchial Tubes Function
Bronchial Tubes Function
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Lungs Function
Lungs Function
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Study Notes
Respiratory System
- The respiratory system's primary function is exchanging gases, delivering oxygen and removing carbon dioxide.
- It has an upper and lower tract.
- The upper tract includes the nose, nasal cavity, and pharynx.
- The lower tract involves the larynx, trachea, bronchial tubes, and lungs.
Nose and Nasal Cavity
- The nose is the external part of the respiratory system, mostly cartilage for flexibility.
- The nasal cavity's lining is moist due to mucus and tiny hairs filter out dust and dirt.
- Air is warmed and moistened before entering the body.
Pharynx
- The pharynx, also known as the throat, connects the nose and mouth to the trachea.
- It acts as a passageway for both air and food.
- Tonsils are found at the entrance of the pharynx, trapping and destroying bacteria.
Larynx
- The larynx, or voice box, is located at the lower end of the pharynx.
- Vocal cords vibrate to produce sound when speaking.
- The epiglottis covers the larynx during swallowing to prevent food from entering the trachea.
- Choking is caused by food entering the trachea instead of the esophagus.
Trachea
- The trachea, or windpipe, is a tube lined with mucus that helps prevent dust and other materials from reaching the lungs.
Lungs
- The trachea divides into two bronchi, each entering a lung.
- Bronchi branch into smaller bronchioles, ending in tiny air sacs called alveoli.
- Gas exchange (oxygen and carbon dioxide) occurs in the alveoli.
- Oxygen is absorbed into the bloodstream, and carbon dioxide is exhaled.
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