Question at position 6 What feature is used by both the respiratory and digestive systems?LarynxPharynxNasal cavityEsophagus单项选择题
A
Larynx
B
Pharynx
C
Nasal cavity
D
Esophagus

Question

Question at position 6 What feature is used by both the respiratory and digestive systems?LarynxPharynxNasal cavityEsophagus

BlackTom AI · Accepted Answer

The pharynx is a shared passageway for both air and food, so it is the feature used by both the respiratory and digestive systems.

1) Relevant knowledge points and concepts:
- Anatomy: The pharynx is a muscular tube behind the nasal and oral cavities that extends from the base of the skull to the esophagus and larynx. It is subdivided into the nasopharynx, oropharynx, and laryngopharynx.
- Physiology: The respiratory system transports air to the lungs; the digestive system transports food to the stomach. The oropharynx and laryngopharynx serve as conduits for both swallowed food/liquid and inhaled/exhaled air.
- Protective mechanisms: The epiglottis and coordinated muscle actions during swallowing prevent food from entering the airway.

2) Step-by-step reasoning:
- Consider each option in turn and ask: does it routinely carry both air and food?
  - Pharynx: yes. Air passes from nasal cavity through nasopharynx/oropharynx to larynx; food passes from mouth through oropharynx/laryngopharynx to the esophagus.
  - Larynx: primarily a respiratory structure (voice production and airway protection) and does not routinely conduct food.
  - Nasal cavity: functions in air conditioning, filtration, and smell — not a food passage.
  - Esophagus: a muscular tube that transports food from pharynx to stomach — not used for air.

3) (No numerical calculations are required.)

4) Why the correct answer is correct:
- The pharynx physically and functionally serves both systems. During breathing it allows passage of air; during swallowing it allows passage of ingested material into the esophagus while the epiglottis blocks the larynx.

5) Why other options are incorrect (briefly):
- Larynx: respiratory only (vocal cords, airway protection).
- Nasal cavity: respiratory only (air conditioning and smell).
- Esophagus: digestive only (food transport to stomach).

Conclusion: Therefore, the correct answer is Pharynx, which matches the provided answer.

Question at position 6 What feature is used by both the respiratory and digestive systems?LarynxPharynxNasal cavityEsophagus单项选择题

类似问题

This air and food passageway extends from the tip of the epiglottis to the superior esophagus (level of C6)/inferior border of the cricoid cartilage:

Which of the following structures normally serves as a passageway for both air AND food?

The anatomical structure that connects the back of the nose to the larynx is the:

Both food and air travel through the:

Which of the following structures normally serves as a passageway for both air AND food?

Which of the following structures normally serves as a passageway for air only (i.e., no food)?

A patient has persistent crushing substernal chest pain that is not relieved by rest or nitroglycerin. Which event most commonly causes this condition?

A 16-year-old boy has markedly elevated cholesterol and cutaneous xanthomas which are bumps or plaques caused by lipid cells building up under the skin (shown in picture below). His father had a myocardial infarction before age 40. Which of the following is the most likely underlying abnormality?

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