Identify the correct sequence of the parts of the respiratory system through which air passes as it enters the body.

Question

BlackTom AI · Accepted Answer

Air flows from the nasal cavity through the pharynx, then the larynx, trachea, bronchi, bronchioles and finally into the alveoli where gas exchange occurs.

1) Relevant knowledge points and concepts
- The respiratory tract is organized into an upper portion (nose/nasal cavity, pharynx, larynx) and a lower portion (trachea, bronchi, bronchioles, alveoli).
- Air entering the body normally passes the nasal cavity (or mouth), is directed through the pharynx into the larynx (voice box), continues down the trachea (windpipe), splits into the primary bronchi (one to each lung), progresses into smaller bronchi and bronchioles, and reaches alveoli for O2/CO2 exchange.

2) Step‑by‑step reasoning
- Entry: air is inhaled through the nose (nasal cavity) where it is warmed, filtered and humidified.
- Pharynx: nasal and oral airflow join in the pharynx (nasopharynx → oropharynx → laryngopharynx).
- Larynx: the pharynx leads into the larynx, which protects the airway during swallowing and houses the vocal cords.
- Trachea: air passes from the larynx into the trachea, a cartilaginous tube.
- Bronchi → bronchioles: the trachea divides into primary bronchi, which branch into smaller bronchi and bronchioles, increasing surface area and air distribution.
- Alveoli: terminal respiratory bronchioles lead to alveolar ducts and alveoli, the microscopic sacs where gas exchange occurs.

3) Calculations
- No numerical calculations are required for this anatomical sequencing question.

4) Why the correct answer is correct
- The sequence Nose → Pharynx → Larynx → Trachea → Bronchi → Bronchioles → Alveoli follows the actual anatomical route air takes from the external environment to the gas‑exchange sites.

5) Why other options are incorrect
- Option listing “Nose, larynx, pharynx…” and similar: larynx comes after the pharynx, so that order is wrong.
- Option missing bronchioles: bronchioles are necessary intermediate airways before alveoli; omitting them skips anatomic steps.
- Option starting with “Mouth…”: while air can enter via the mouth, the option also places the larynx before the pharynx (incorrect order) and differs from the nose‑first sequence asked.

6) Conclusion
The anatomically correct sequence is Nose, pharynx, larynx, trachea, bronchi, bronchioles, and alveoli, which matches the provided answer.

Identify the correct sequence of the parts of the respiratory system through which air passes as it enters the body.单项选择题

类似问题

Continuous bubbling in the water‑seal chamber of a chest drainage system indicates?

Contraction of the respiratory diaphragm and external intercostal muscles leads to a [ Select ] rise drop in alveolar pressure, which results in [ Select ] inhalation exhalation .

What are two effective breathing exercises for improving lung function?

Which respiratory structure serves as the main airway to the lungs?

Mr. Stuckey has a history of COPD. He experienced an exacerbation of his condition and was taken to the emergency department for treatment. What does COPD stand for?

Warm-blooded animals consume much more oxygen per body mass than cold-blooded animals. Which of the features below helps them in reducing moisture loss through breathing a lot of air?

The area in the lungs where oxygen and carbon dioxide are exchanged is called the:

Gas exchange between the blood and air occurs in the:[Fill in the blank]

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单