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Breathing and Exchange of Gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYBreathing and Exchange of Gases5 Marks
Question
Distinguish between:
  1. Tracheoles and bronchioles.
  2. Right lung and left lung.
✓

Answer

  1. Differences between tracheoles and bronchioles are:
S.No.
Tracheoles
Bronchioles
(i)
These are respiratory tubes of insects.
These are respiratory tubes of mammals.
(ii)
They penetrate all parts of the body.
They occur only in the lungs.
(iii)
They end blindly in tissue cell. 
They give off alveolar ducts.
  1. Differences between right and left lungs are:
S.No.
Right Lung
Left Lung
(i)
It has three lobes and median border is entire.
It has two lobes with anteromedian border having cardiac notch.
(ii)
It is larger and heavier.
It is smaller and lighter.
(iii)
It is shorter, but broader than the left lung.
It is longer, but narrower than the right lung.

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