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
Uma (given name) rice fields. Uma in Japanese means horse. Uma in Swahili means bite. Uma (given name) Uma is a given name in various cultures. In India, it is the name of the Hindu goddess, who is more commonly known as Parvati. In Sanskrit the word "" can further mean "tranquillity", "splendour", "fame" and "night". In Hebrew and Aramaic its meaning is "nation". It is also used by the Tiv people of Cameroon and Nigeria where the meaning in the Tiv language is "life". The name Uma is also popular in the Otukpo subgroup of the Idoma people of Nigeria and the