Trachea are generally highly elastic but they may calcify with age. The trachealis muscle connects the ends of the incomplete rings and contracts during coughing, reducing the size of the lumen of the trachea to increase the rate of air flow. The esophagus lies posteriorly to the trachea, adjoining along the tracheoesophageal stripe. Circular horizontal bands of fibrous tissue called the annular ligaments of trachea join the tracheal rings together. The cartilaginous rings are incomplete to allow the trachea to collapse slightly so that food can pass down the esophagus. A flap-like epiglottis closes the opening to the larynx during swallowing
What Is Life "Rolling Stone" readers' poll, titled "10 Greatest Solo Beatle Songs", the song placed fourth, with the editor commenting: "The track is deceptively simple, and more layers become apparent the more often you play it." "What Is Life" has featured in Bruce Pollock's book "The 7,500 Most Important Songs of 1944–2000", Treble website's "The Top 200 Songs of the 1970s" (ranked at number 101) and Dave Thompson's "1000 Songs That Rock Your World" (at number 247). "What Is Life" was included on the 1976 compilation "The Best of George Harrison" as well as 2009's "". The song has also been featured