(a) Explain how, the air we breathe in gets cleaned while passing through the nasal passage.
(b) Why do the walls of trachea not collapse when there is less air in it ?
(c) How are oxygen and carbon dioxide exchanged in our body during respiration ?
(d) How are lungs designed in human beings to maximise the exchange of gases ?
(a) Explain how, the air we breathe in gets cleaned while passing through the nasal passage.
(b) Why do the walls of trachea not collapse when there is less air in it ?
(c) How are oxygen and carbon dioxide exchanged in our body during respiration ?
(d) How are lungs designed in human beings to maximise the exchange of gases ?
A) there are hairs which clean the air entering the nasal passage...
B) rings of cartilage are present which prevent the wall of the trachea to collapse when there is no or less air present in trachea.
C) gaseous exchange takes place through diffusion in our body. O2 from alveoli (lungs) is passed into blood vessels surrounding it a CO2 from blood is passed to alveoli.
D) lungs have sac-like structures called alveoli which are present to provide a larger surface area for gaseous exchange between lungs an blood...
A) there are hairs which clean the air entering the nasal passage...
B) rings of cartilage are present which prevent the wall of the trachea to collapse when there is no or less air present in trachea.
C) gaseous exchange takes place through diffusion in our body. O2 from alveoli (lungs) is passed into blood vessels surrounding it a CO2 from blood is passed to alveoli.
D) lungs have sac-like structures called alveoli which are present to provide a larger surface area for gaseous exchange between lungs an blood...
