Q73 / 200 · MHT CET - Medical 2026 (23 April Shift 1) · Biology
Select the INCORRECT statement with respect to the respiratory system.
- AThe oropharynx is a common passage for food and air.
- BLarynx contains vocal cords for producing sound.
- CThe trachea is supported by 'C' shaped rings of cartilage.
- Correct answerDThe trachea is internally lined by simple squamous epithelium.
Solution
The pharynx is the common passage for food and air, with the oropharynx being a part of it.
The larynx is a cartilaginous box which helps in sound production and is hence called the sound box.
The trachea is a straight tube extending up to the mid-thoracic cavity. The trachea, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete ('C' shaped) cartilaginous rings.
The trachea is internally lined by pseudostratified ciliated columnar epithelium, not simple squamous epithelium. Simple squamous epithelium is found in the walls of alveoli where it forms a diffusion boundary.
Answer: The trachea is internally lined by simple squamous epithelium.
The larynx is a cartilaginous box which helps in sound production and is hence called the sound box.
The trachea is a straight tube extending up to the mid-thoracic cavity. The trachea, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete ('C' shaped) cartilaginous rings.
The trachea is internally lined by pseudostratified ciliated columnar epithelium, not simple squamous epithelium. Simple squamous epithelium is found in the walls of alveoli where it forms a diffusion boundary.
Answer: The trachea is internally lined by simple squamous epithelium.
Hence, the correct answer is option: 'D'.