Letter: w

A cylindrical of mucosal tissue whose shape is supported by rings of cartilage and a tough membrane sheath, approximately 4 in (11.3 cm) long, that originates at the larynx. It extends to the fifth dorsal vertebra, where it divides at a point called the carina into two bronchi, one leading to each lung. SEE bronchi, trachea.

One can infuse through a catheter but aspiration (pull back) is occluded.

Withdrawal Occlusion

Work of Breathing