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Regarding Human Respiratory system - choose the incorrect one :


( A ) Each terminal bronchiole gives rise to a number of very thin, irregular walled and non vascular bag-like structures called alveoli
( B ) Each bronchi undergoes repeated divisions to form the secondary and tertiary bronchi and bronchioles ending up in very thin terminal bronchioles
( C ) Trachea divides at the level of 5th thoracic vertebra into a right and left primary bronchi
( D ) Trachea is a straight tube extending up to the mid-thoracic cavity

1 Answer

(A) is the right answer.

In Human : 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 bronchi 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 non vascular bag-like structures called alveoli
answered Apr 3, 2014 by pady_1
 

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