AP BIOLOGY

Detailed explanation-1: -The esophagus is a 25-cm long fibromuscular tube that connects the pharynx to the stomach. It starts in the neck at the level of C6 vertebra, extending through the mediastinum until its insertion in the diaphragm at the level T10 vertebra via a separate opening in the right crus of the diaphragm.

Detailed explanation-2: -By endoscopy, the usual length of on adult essphagus is measured as 40 cm from the incisor to the point where mucosal change occurs5–6), but the esophageal length varies from one person to another according to physical status.

Detailed explanation-3: -The normal esophagus measures up to 30 mm in diameter. Peptic strictures occur usually at the squamocolumnar junction and measure 1–4 cm in length. The typical patient with a peptic stricture is elderly with a long history of gastroesophageal reflux (GER).

Detailed explanation-4: -How long is the esophagus? The average adult esophagus is about 10 to 13 inches long. It’s about three-fourths of an inch thick at its smallest point.

Detailed explanation-5: -II-Aortic arch and left bronchus crosses esophagus anteriorly-25cm from incisor teeth.