Esofagus
Esofagus is a type of organ in the vertebrates consisting of muscular tubes passed by food from farinks to the abdomen. When swallowed, the food passes through the mouth through the farinks into the esophagus, and runs peristalsis in the abdomen. The word esophagus comes from the Latin word œsophagus, derived from the Greek word oisophagos, which means "entrance to eat." Human epsofagus connects to the larinks in farinks at the C6 vertebrae. Esofagus passes through the posterior mediastinum in the thorax and enters the abdomen through the hole in the diaphragm at the thoracic vertebrae level. This esofagus is usually about 25cm, but it has been noted that the esophagus measures 10-50 cm according to individual body height. Esofagus is divided into cervical, thoracic and abdomen. Due to the farinks of the adjuvant muscles, admission into the esophagus opens only when swallowing or spitting.