Question:

Choose the correct sequence of the air passage in humans is

Updated On: Jul 6, 2022
  • Nose-Larynx -Pharynx Bronchioles-Alveoli
  • Nose -Pharynx-Larynx Bronchioles-Bronchi
  • Nose-Pharynx -Larynx Bronchioles - Trachea
  • External nostril -Nasal passage Internalnostril -Pharynx-Larynx- Trachea-Bronchi -BronchioleAlveoli
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The Correct Option is D

Solution and Explanation

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.
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Concepts Used:

Breathing and Exchange of Gases

A metabolic process, which is carried out by all living organisms including plants, animals, and humans for the production of energy and to stay alive is Respiration.  Except for required anaerobes, every other organism from amoeba to humans needs oxygen for survival. And evolution has reported a number of systems that allows the exchange of gases in organisms.

There are two types of respiration such as;

  1. Aerobic respiration — to produce energy, it occurs in the presence of oxygen
  2. Anaerobic respiration — to produce energy, occurs in the absence of oxygen

Breathing can be simply derived as the process of inhaling oxygen gas from the atmosphere and exhaling the carbon dioxide gas back into the atmosphere is termed breathing and the process is commonly known as respiration.

Read More: Breathing and Exchange of Gases