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Questions and Answers
What is the function of the mucous membrane in the respiratory system?
Traps debris and pathogens
How do bronchioles differ from bronchi in terms of structure?
Bronchioles do not contain cartilage in their walls
What is the role of alveoli in the respiratory system?
Alveoli are small sacs where gas exchange occurs
How many lobes does the right lung have?
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Describe the appearance of the lungs in the human body.
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What are the three regions of the pharynx?
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What is the common passageway of both the digestive and respiratory systems?
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What is the visible structure that forms a prominent feature of the face?
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What is another name for the larynx?
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What is the function of the bronchi?
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Study Notes
Respiratory System
- The mucous membrane traps debris and pathogens.
Bronchioles
- Bronchioles are about 1mm in diameter and branch further into terminal bronchioles, leading to gas exchange structures.
- There are over 1000 terminal bronchioles in each lung.
- Bronchioles have muscular walls without cartilage, allowing them to change size and regulate airflow.
Alveoli
- Alveolar ducts are tubes composed of smooth muscle and connective tissue, opening into clusters of alveoli.
- An alveolus is a small, grape-like sac attached to an alveolar duct.
Lungs
- The lungs are the principal organs of respiration, being spongy, pinkish organs shaped like upside-down cones.
- The right lung has three lobes, while the left lung has two lobes to accommodate the heart.
The Nose
- The nose refers to both the external visible structure and the internal nasal cavity.
- The nasal cavity extends from the external opening to the pharynx, divided into right and left sides by the nasal septum.
Pharynx
- The pharynx is a common passageway for the digestive and respiratory systems.
- The pharynx has three regions: nasopharynx, oropharynx, and laryngopharynx.
Pharynx Regions
- The nasopharynx is the superior part of the pharynx, extending from the internal nares to the level of the uvula.
- The oropharynx is a passageway for both air and food, extending from the uvula to the epiglottis.
- The laryngopharynx extends from the epiglottis to the lower margin of the larynx, diverging into the digestive and respiratory systems.
Larynx
- The larynx, or voice box, consists of an outer casting of nine cartilages connected by muscles and ligaments.
Trachea
- The trachea, or windpipe, is a membranous tube composed of connective tissue and smooth muscles.
Bronchi
- The trachea divides into the left and right primary bronchi, providing a passageway for air into and out of each lung.
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Description
Explore the structures of the nose, including the visible external features and the internal nasal cavity. Learn about the nasal septum that divides the nasal cavity, and delve into the pharynx as a common passage for both the digestive and respiratory systems.
