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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