View of Ultrasound guided needle mark to trachea for unidentified

Trachea and bronchi histology: Video & Anatomy trachea The trachea is a tube-shaped structure consisting of 15-20 D-shaped cartilage rings anterolaterally bridged by annular ligaments The trachealis muscle (smooth trachea 1 The trachea is surrounded by c-shaped rings of hyaline cartilage There are typically 16–20 cartilaginous rings stacked along the length of

trachea The trachea is a flexible air tube located in the midline of the neck and rib cage