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ICSE Class 6 Answered

DEFINE OF TRACHEA NOSE BRONCHIOLES BRONCHI LARYNX ALVEOLI PHARYNX LUNGS ALVEOLAR SACS  ALVEOLUS
Asked by rajinder.rs758 | 07 Oct, 2018, 10:02: AM
answered-by-expert Expert Answer
Trachea connects the nose to the lungs. The trachea is supported by cartilaginous rings so that it remains wide open for the passage of air without any obstruction.
The trachea divides into two tubes called bronchi which transport air into the lungs. Inside the lungs, each bronchus divides into smaller tubes called bronchioles
The air sacs lie at the end of each bronchiole called the alveoli. Each alveolus has a rich network of fine blood vessels called capillaries. Exchange of gases takes place at the alveoli.
Lungs are the main parts of the respiratory system. Air and blood are brought into close contact to facilitate the exchange of gases.
The larynx, commonly called the voice box, is an organ in the neck of mammals involved in protecting the trachea and sound production. It manipulates pitch and volume.
The pharynx is the part of the neck and throat situated immediately behind the mouth and nasal cavity. 
The alveoli sacs are formed by a group or cluster of alveoli
 The external midline projection from the face through which you breathe and smell is called the nose.  
Answered by Sivanand Patnaik | 08 Oct, 2018, 10:43: AM
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