Question

Choose the correct sequence of the air passage in humans is

• A. Nose-Larynx -Pharynx Bronchioles-Alveoli
• B. Nose -Pharynx-Larynx Bronchioles-Bronchi
• C. Nose-Pharynx -Larynx Bronchioles - Trachea
• D. External nostril -Nasal passage Internalnostril -Pharynx-Larynx- Trachea-Bronchi -BronchioleAlveoli

Answer 1

Answer: (D)

External nostril -Nasal passage Internalnostril -Pharynx-Larynx- Trachea-Bronchi -BronchioleAlveoli

Answer 2

Pair of external nostrils opens above the upper lips, which goes into a nasal passage. It opens into the nasopharynx. Nasopharynx opens through the glottis of the larynx region into the trachea. Trachea is a straight tube extending up to mid thoracic cavity, which divides at the right and left bronchi. Each bronchi undergoes repeated division to form secondary and tertiary bronchi and bronchioles ending up in very thin terminal bronchioles, which gives rise to a number of very thin, irregular walled,vascularised bag like structure called alveoli.