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Questions and Answers
What is the main function of the respiratory system?
What is the main function of the respiratory system?
The trachea is divided into three branches before reaching the lungs.
The trachea is divided into three branches before reaching the lungs.
False
What are the tiny air sacs in the lungs called?
What are the tiny air sacs in the lungs called?
alveoli
The _____ are lined with cilia and a thick layer of mucus to trap bacteria and dirt.
The _____ are lined with cilia and a thick layer of mucus to trap bacteria and dirt.
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Match the following parts of the respiratory system with their functions:
Match the following parts of the respiratory system with their functions:
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What happens to the diaphragm when we inhale?
What happens to the diaphragm when we inhale?
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Alveoli provide a small surface area for gas exchange.
Alveoli provide a small surface area for gas exchange.
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What is the primary reason for the presence of mucus in the bronchi?
What is the primary reason for the presence of mucus in the bronchi?
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When exhaling, the diaphragm and muscles of the _____ relax.
When exhaling, the diaphragm and muscles of the _____ relax.
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Which of the following statements about the respiratory system is true?
Which of the following statements about the respiratory system is true?
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Study Notes
The Respiratory System
- The respiratory system's role is to take in oxygen and remove carbon dioxide from the body.
- Air enters through the nasal cavity or mouth.
- Air travels down the trachea, a tube with strong rings of cartilage.
- The trachea branches into two bronchi.
- Bronchi further divide into bronchioles.
- The end of the bronchioles have tiny sacs called alveoli.
Alveoli
- Alveoli are the sites of gas exchange.
- Alveoli have a large surface area for efficient gas exchange.
- Alveoli have moist surfaces that allow oxygen to dissolve.
- Alveoli have a thin lining allowing easy diffusion of gases.
- They have a dense network of capillaries, which allows for efficient gas exchange.
- The surface area of the alveoli in both lungs is equivalent to a tennis court.
Breathing Mechanics
- Breathing relies on the muscles in the rib cage and the diaphragm to change the space in the chest cavity.
- Inhalation involves the diaphragm contracting, expanding the chest cavity, and lowering the pressure inside the lungs.
- Air rushes into the lungs to equalize the pressure.
- Exhalation involves the diaphragm relaxing, decreasing the chest cavity space, and increasing pressure inside the lungs.
- Air is expelled as pressure increases.
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Description
This quiz explores the structure and function of the respiratory system, focusing on key components like the trachea, bronchi, and alveoli. Discover how gas exchange occurs in the alveoli and the mechanics of breathing. Test your knowledge of this vital system and its processes.
