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The gaseous exchange portion of the human respiratory tract include/s :
- a)alveoli and alveolar ducts
- b)alveoli, bronchioles, trachea and nasal chambers
- c)alveoli and bronchioles
- d)alveoli, bronchioles and trachea
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
The gaseous exchange portion of the human respiratory tract include/s ...
Ans.
The lower airways or lower respiratory tract includes the portion of the larynx below the vocal folds, trachea, bronchi and bronchioles. The respiratory zone includes the respiratory bronchioles, alveolar ducts and alveoli, and is the site of oxygen and carbon dioxide exchange with the blood.
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Most Upvoted Answer
The gaseous exchange portion of the human respiratory tract include/s ...
The gaseous exchange portion of the human respiratory tract includes the alveoli and alveolar ducts. The alveoli are tiny air sacs located at the end of the respiratory bronchioles and are the main site for gaseous exchange in the lungs.
Explanation:
1. The respiratory tract:
The respiratory tract is divided into the upper respiratory tract and the lower respiratory tract. The upper respiratory tract includes the nasal cavities, pharynx, and larynx, while the lower respiratory tract includes the trachea, bronchi, bronchioles, and alveoli.
2. Gaseous exchange:
Gaseous exchange is the process by which oxygen from the air enters the bloodstream and carbon dioxide, a waste product of cellular respiration, is removed from the bloodstream and exhaled. This process occurs in the alveoli.
3. Alveoli:
The alveoli are small, thin-walled sacs located at the end of the respiratory bronchioles. They are surrounded by a network of capillaries, allowing for the exchange of gases between the air in the alveoli and the blood in the capillaries. The walls of the alveoli are highly permeable to gases, allowing oxygen to diffuse from the alveoli into the bloodstream and carbon dioxide to diffuse from the bloodstream into the alveoli.
4. Alveolar ducts:
The alveolar ducts are thin tubes that connect the respiratory bronchioles to the alveoli. They serve as a pathway for air to reach the alveoli, where gaseous exchange occurs.
5. Importance of alveoli and alveolar ducts:
The alveoli and alveolar ducts play a crucial role in the respiratory system by facilitating the exchange of gases. Oxygen is taken up by the bloodstream in the alveoli and transported to the body's tissues, where it is used for cellular respiration. Carbon dioxide, a waste product of cellular respiration, is removed from the bloodstream and exhaled through the alveoli.
In conclusion, the gaseous exchange portion of the human respiratory tract includes the alveoli and alveolar ducts. These structures are responsible for the exchange of gases between the air in the lungs and the bloodstream, playing a vital role in the process of respiration.
Explanation:
1. The respiratory tract:
The respiratory tract is divided into the upper respiratory tract and the lower respiratory tract. The upper respiratory tract includes the nasal cavities, pharynx, and larynx, while the lower respiratory tract includes the trachea, bronchi, bronchioles, and alveoli.
2. Gaseous exchange:
Gaseous exchange is the process by which oxygen from the air enters the bloodstream and carbon dioxide, a waste product of cellular respiration, is removed from the bloodstream and exhaled. This process occurs in the alveoli.
3. Alveoli:
The alveoli are small, thin-walled sacs located at the end of the respiratory bronchioles. They are surrounded by a network of capillaries, allowing for the exchange of gases between the air in the alveoli and the blood in the capillaries. The walls of the alveoli are highly permeable to gases, allowing oxygen to diffuse from the alveoli into the bloodstream and carbon dioxide to diffuse from the bloodstream into the alveoli.
4. Alveolar ducts:
The alveolar ducts are thin tubes that connect the respiratory bronchioles to the alveoli. They serve as a pathway for air to reach the alveoli, where gaseous exchange occurs.
5. Importance of alveoli and alveolar ducts:
The alveoli and alveolar ducts play a crucial role in the respiratory system by facilitating the exchange of gases. Oxygen is taken up by the bloodstream in the alveoli and transported to the body's tissues, where it is used for cellular respiration. Carbon dioxide, a waste product of cellular respiration, is removed from the bloodstream and exhaled through the alveoli.
In conclusion, the gaseous exchange portion of the human respiratory tract includes the alveoli and alveolar ducts. These structures are responsible for the exchange of gases between the air in the lungs and the bloodstream, playing a vital role in the process of respiration.
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The gaseous exchange portion of the human respiratory tract include/s :a)alveoli and alveolar ductsb)alveoli, bronchioles, trachea and nasal chambersc)alveoli and bronchiolesd)alveoli, bronchioles and tracheaCorrect answer is option 'A'. Can you explain this answer?
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