The trachea
A
In adult is about 15 cm long
B
Extends to the level of the 6th thoracic vertebra in full inspiration
C
Tracheostomy is done at the level of first to third tracheal rings
D
Lies exactly in the midline
E
Bears a diameter correlating with the diameter of the index finger
Correct Answer: In adult is about 15 cm long, Extends to the level of the 6th thoracic vertebra in full inspiration
