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STD 11 - 14. Breathing and exchange in gases — BIOLOGY STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceBIOLOGYSTD 11 - 14. Breathing and exchange in gases1 Mark
MCQ
At which thoracic vertebra does trachea divide into right and left primary bronchi?
  • ✓
    $5$
  • B
    $6$
  • C
    $9$
  • D
    $4$
✓

Answer

Correct option: A.
$5$
a
Trachea is a straight tube extending upto the mid thoracic cavity, which divides at the level of $5 th$ thoracic vertebra into the right and left bronchi. Each bronchi undergoes repeated division to form secondary and tertiary bronchi ending up to very thin terminal bronchioles

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