The isthmus of the thyreoid gland covers the second, third, and fourth tracheal rings.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
One of Killian's tracheal tubes may be introduced through the tracheotomy wound and the body extracted by means of suitable forceps.
"Manual of Surgery Volume Second: Extremities--Head--Neck. Sixth Edition."
Alexander Miles Alexis Thomson
There is, besides, a tracheal system, which is composed of very minute elastic spiral tubes, designed for the purpose of conveying air both to and from the plant.
"The Book of Household Management"
Mrs. Isabella Beeton