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Human respiratory system MCQ - Practice Questions with Answers
Edited By admin | Updated on Sep 18, 2023 18:34 AM | #NEET
Quick Facts
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30 Questions around this concept.
Solve by difficulty
Gaseous exchange for the respiration process occurs in
Study the given figure of the respiratory passage carefully and identify the parts labeled A, B, C, D, and E.
Which of the following is not major component of our food ?
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The cartilaginous box which helps in sound production and is called the soundbox is
Select correct sequences of parts of human respiratory system:
The nostrils lead to a nasal chamber through the nasal passage which opens into
Two friends are eating together at a dining table. One of them suddenly starts coughing while swallowing some food. This coughing would have been due to improper movement of:
Concepts Covered - 1
Respiratory System in Humans
- The human respiratory system is divisible into two portions:
- Conducting Portion:
- Nose
- Pharynx
- Larynx
- Trachea
- Bronchi
- Lobular and terminal bronchioles
- Respiratory Portion:
- Respiratory bronchioles
- Alveolar ducts
- Alveolar sacs and alveoli
- Conducting Portion:
- There is a pair of external nostrils opening out above the upper lips. It leads to a nasal chamber through the nasal passage.
- The nasal chamber opens into the pharynx.
- The pharynx opens through the larynx region into the trachea.
- The larynx is a cartilaginous box which helps in sound production and hence called the soundbox.Larynx is made up of 9 cartilages out of which three are paired and three are unpaired
- During swallowing, glottis can be covered by a thin elastic cartilaginous flap called the epiglottis to prevent the entry of food into the larynx.
- The trachea is a straight tube extending up to the mid-thoracic cavity, which divides at the level of 5th thoracic vertebra into a right and left primary bronchi.
- Each bronchus undergoes repeated divisions to form the secondary and tertiary bronchi and bronchioles ending up in very thin terminal bronchioles.
- The tracheae, primary, secondary and tertiary bronchi, and initial bronchioles are supported by incomplete cartilaginous rings.
- Each terminal bronchiole gives rise to a number of very thin, irregular-walled and vascularised bag-like structures called alveoli.
- The branching network of bronchi, bronchioles and alveoli comprise the lungs.
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